Known: x² + 9x + 81 = 0, find the value of x³.

As the sun sets, the golden light shines on the land, gilding the teacher writing by the window.

"Is this kind of question with △ less than zero to test students' number sense?" Wen Qingyu was barefoot, wearing only a big white shirt on his upper body, exposing half of his fragrant shoulders, and crawled gently beside him.

"yes, it's next week's weekend homework and see if anyone can come up with something unexpected." Wen Yifan smiled, "When the time comes, don't meddle too quickly, causing them to lose the ability to think." ”

"Don't worry, it's one of my great pleasures to watch the fool rack his brains!" Giggling, Wen Qingyu's fingers played with his hair, "But then again, I originally thought that the teacher also had a future plan for that imitator, but I didn't expect that he just existed as a 'tool man' who would be discarded when he ran out." ”

"Or else? Could it be that I really want to accept that kind of bad person as my student? Wen Yifan shook his head helplessly, "Born with histrionic personality disorder, he has always wanted to attract the attention of others - but unfortunately, when this histrionic personality disorder encounters extreme inferiority due to denial, everything has changed." ”

Again, extreme inferiority turns into extreme conceit, leading him to obtain spiritual satisfaction by vigorously denying others to elevate him, and on the other hand, consciously or unconsciously, he cares about what others think of him. Over time, this contradictory personality gradually distorted, which led to what happened afterwards. This is also the reason why I will feel at ease to let him kill Jiang Xiaoyu - he has histrionic personality disorder, and when he sees Xiang Haisheng, who is tied up and unable to resist, he will definitely plan to let him watch all this happen as his own audience, which is also in my arms. Five slender fingers turned the pen nimbly, and he continued, "Or is it true that every human soul is contradictory?" Perhaps, from this point of view, each of us has the potential to become mentally ill! ”

The sun was setting slowly, but it seemed to be reluctant to look at the earth, and the golden afterglow was the last trace of tenderness it left to the world.

"Ding-" In this quiet moment, the computer suddenly made a sound.

"Huh?" Wen Yifan tapped on the keyboard and turned on the computer, only to see that one of the prompt pages flashed with a warning light.

"Tip: An unknown file is being transferred and has been intercepted. Destination: Yunxiang Police Station. ”

Looking at the file thoughtfully, he first set up three layers of encryption on his computer before opening the video.

The moment the video opened, the entire screen of the computer was replaced by garbled characters like a TV, and it lasted for a long time.

Just as Wen Yifan frowned slightly, thinking that this was a prank against the police station and was about to close the video, the picture suddenly changed to a chair - an empty chair.

"Comrade police officer who is watching this video, hello, I am reporting a clue, for some reason, I don't want to come forward, so you can call me 'shadow', but what I want to talk about today is not about this issue."

"It's ...... What the? Wen Qingyu leaned over with a little curiosity and asked.

"You may be distrustful of my presence, but please listen to what I have to say before making your judgment, for the clues I have provided ......"

"I can help you find the real 'Yunxiang Killer'."

His pupils narrowed slightly, Wen Yifan frowned slightly, and his right index finger tapped lightly on the tabletop, and he seemed to be in a state of thought......

This is...... Who?

"First of all, I want to explain that I sent this video here for only one purpose, that is, to arrest the 'Yunxiang Murderer', who has been at large for ten years, and there is nothing else to ask for."

"Haha, look, teacher, someone said they wanted to guillotine you!" Wen Qingyu listened to it and giggled.

But Wen Yifan just watched the video quietly, revealing a little different light in his eyes, as if he was thinking about something.

"So first of all, let's talk about my conclusion - the 'Yunxiang Murderer' you are looking for, male, may now be engaged in some profession similar to that of a psychiatrist, it is very likely that he went to Yunxiang during the crime, and then left Yunxiang, and most importantly, ......"

"He was friends or relatives with some of the officers in the police station."

The "click......" hour hand advanced one block again, and the time came to seven o'clock.

- This guy...... How do you know this?

Wen Yifan lowered his head slowly, with a little more jealousy in his eyes, but he didn't say anything, but continued to read.

"Speaking of which, I'm afraid you should have your own suspicions! But don't worry, I can help you narrow it down even further. "The voice in the video has obviously been processed, I don't know if it's because of the voice changer, or because of the owner of the voice, this voice is like a machine, without the slightest emotion, what's worse is that this kind of absolutely rational person, Wen Yifan has encountered a ...... before

– Richard Smith...... Is this your heir?

"What I'm going to say next, please listen carefully: 'Yunxiang Killer' is very likely to have participated in, or indirectly participated in, in the psychological care of some police officers, and as for the object, it is the police officer who once killed Jiang Qing!"

！！！

His eyelids jumped slightly, and the uneasiness in Wen Yifan's heart was confirmed-sure enough, this part of the action was still too obvious.

"Moreover, I have enough reason to suspect that the police officer was controlled by it nine times out of ten, and thus became radicalized, if I guessed correctly, it was also this police officer who shot the impersonator to death!"

- If you don't delete this video, it's going to be a big problem.

Ten fingers quickly roamed over the keyboard, and after a sigh of relief from the bottom of his heart, he also began to be alert.

- Who the hell is this?

In fact, as early as the time Xu Wenxin was treated, he realized that he might need the power of the police to help him eradicate Jiang Xiaoyu and one of the imitators, and because of this, he planted a seed for Xu Wenxin - people who committed heinous crimes should not live in this world.

Because of this, he was able to safely make Jiang Xiaoyu, the imitator and Xiang Haisheng kill each other, and directly eliminated two of them. The reason why Xu Wenxin was called at that time and did not call the police directly was also to ensure that Xu Wenxin learned the news and went to the police with him.

That's why after that, he wiped out two threats with one stone.

But now, some people are aware of what they are doing......

He was cautious enough that he didn't show his face in it, and he was even able to deduce his own information, this kind of person, had to ......

Wait a minute!

Suddenly remembered something, he immediately wanted to terminate the operation of deleting the video, but ......

Too late!

At this critical moment, Wen Qingyu took the first step, spit out the chewing gum in his mouth with lightning speed, and then glued it to the camera of his notebook.

"Click-" Almost the next second, the camera automatically snapped a picture and sent it towards a computer of unknown origin.

- Tricked.

While nodding at Wen Qingyu on the side, he immediately opened the contact page of the "Sacrificial Academy" and contacted the mathematician.

- Immediately, block all channels from this source to the outside, and cut off the "road" of the computer that wants to establish a connection with me.

The news came out in an instant, and he wasn't worried that anyone would find out about it, unless that person was better than a mathematician.

"Boom-" A burst of electricity sounded, Wen Yifan looked at the computer quietly, watching a voice chat tied up on it automatically open.

- Damn, it's a trick.

Just now, he almost instantly realized that it was impossible for a thoughtful person like him not to suspect that he could hack into the police station's system, so the other party should not expect the police station to receive those contents, and the reason why he said so much was because ......

He's stalling for time to hack into his computer.

"Hello, writer, although I have already guessed that you will be able to hack into the police system, it seems that I still underestimated your vigilance. Otherwise, I will be able to see you for what you really are. ”

The emotionless mechanical sound slowly came out of the speaker, and when he heard the words, Wen Yifan couldn't help but glance at Wen Qingyu, this girl now held her head high, looking proud.

"So, let's introduce myself first. I am Richard Smith's heir and his proudest student, and you can call me 'The Heir'. ”

"Four days ago, there was a horrific terrorist attack in Monterey Bay, California, USA – those men almost leveled the area with thermal weapons, injuring thousands of people and killing hundreds, including my teacher, Professor Richard Smith."

"Soon, this terrorist organization that shocked the world collapsed under the full suppression of the United Nations and other countries in the world, and dozens of forces, large and small, including the remnants of the party, were all defeated, and it can be said that the existence of this organization was completely eradicated, but this is not what I want to talk about today."

"Actually, at this point, you should also understand! I knew the inside story of all this, including how you planned it, and how each of you planned this incident, all of which I had known from Professor Smith a long time ago. ”

Therefore, the teacher's death was not an accident, but a real murder! What's even more infuriating is that the people who executed this plan would be so mad that they chose to bury the thousands of civilians around him in order to murder a hero! This is absolutely an unforgivable sin, an intolerable evil in the history of mankind! ”

"And you, you should pay the price!"

- This guy...... How much do you know? The phone call that used to be his own had already blocked all of Smith's means of sending instructions to the outside world, could it be......

He reasoned on his own based on some intelligence?

"Writer, I know you're definitely revisiting your plan now, trying to find some flaws in it—in fact, you don't need to look so hard to find it, because I've already found it for you, and your whole operation, except for the one that touches the police—and even if it does, it will only make you suspicious, and it will not be used as evidence in court to convict you."

- I see, did you just say that in order to shake me and reveal new flaws?

With his fingers interlocked, he just looked at the screen and didn't say much.

"'Sacrificial Temple', the teacher once said, this is the biggest cancer in human history, the most evil organization that should be completely eradicated, the teacher spent thirty years, fighting against this organization, and now this flag symbolizes resistance, I will carry it forward until you are all caught, this is my promise."

"And my first target is you, the writer—you murderer of my teacher deserve to be burned in hell."

"Maybe you're a little surprised, maybe you already know why I found out about you, but in order to make the rest a little more interesting, I decided to tell you about my reasoning process."

- So, let's see how much information this guy has, and then decide what to do next!

With that in mind, he slowly picked up a tape recorder and pressed the buttons.

"First of all, we focused on the first case, that is, the time period when Jiang Qing was killed, and through the collection of various versions of the news, I almost restored the details of that time - Jiang Qing seemed to want to attack the police at that time, and then the police officer fired the first shot, which hit him in the arm. But that didn't stop him, and the second shot hit him in the leg, but no one expected that he would even want to use his teeth - and that's when the third shot hit him right in the eyebrow, killing him with one blow. ”

"In this way, the policeman fired a total of three shots, and the gun hit the target, and I have to say that his marksmanship is indeed very accurate."

"But in the case of the impersonator that followed, there was something strange to me about, and that was that the impersonator was killed just as he stood up and did not show any obvious intent to attack—and he was shot right in the eyebrow. And guess what's more coincidental? ”

"The policeman who killed him was the same person who killed Jiang Qing."

There was coldness in his voice, and he continued: "Then when I put these two incidents together, I found the clue - this policeman shot two prisoners in a row in a short period of time, but his style of acting was completely different - when he killed the first prisoner, his original intention should have been to control the prisoner, and then hand it over to the law, but Jiang Qing resisted too quickly and was forced to shoot him. ”

"But when it came to the second prisoner, it was just that he stood up with his hands full of blood, and made a slight gesture that seemed to be trying to resist, and he was shot dead by this policeman without hesitation, and there was not even such an act as shooting the leg, writer, do you think this situation is normal?"

- I see, that's what I'm worried about.

Wen Yifan nodded thoughtfully, a slight smile on the corner of his mouth.

"Combined with previous experience, although the police will not be punished by the law for shooting and killing a prisoner, they will inevitably be forced to undergo psychological treatment, and it is obvious that the policeman should not be able to escape this process, but after receiving psychological treatment, she can show such a big negative change, which I never expected, combined with everything else, I quickly came to my conclusion."

"You're a psychiatrist who is good at manipulating people's minds, writers, you have been underestimated, they shouldn't treat you as just an ordinary serial murderer, and your harm to society as a whole is definitely one of the few in the whole history. So I'm not going to make that mistake anymore. Writer. ”

"By the way, the next thing to say could be good news or bad news for you, but I think you need to know that."

"This call will only be activated when you delete my files, which means that the person who is talking to you now is the real me."

"But you don't think that's the end of it! In fact, this voice chat is only a procrastination to find your exact location - unfortunately, you react very quickly, and the person who cut off my signal must be a mathematician! He's on a higher computer level than yours, and even I can't relocate him, but the information I have now is sufficient. ”

"Writer, you're in Yunhe right now, and you know what's more interesting? The policeman who killed the two criminals, her police number is also the police number of the Yunhe City Public Security Department, through the query identification, I already know her name - Xu Wenxin, isn't it? ”

"I'm also surprised to be able to get so much information on the first side - writer, are you a paper tiger? In this way, perhaps the day is coming to guillotine you. Rest assured, I'm not as shameless as you are to hack into the police system, not today, and not in the future. Because the teacher's wish is to win you with integrity, I will not let the teacher be ashamed. ”

"That's all I have, and what do you know about me? I'm looking forward to what's next. ”

"See you then, writer."

"Toot-" The voice call was hung up by the other party, looking at the screensaver of the computer, Wen Yifan fell silent.

"I want to ...... Beat me with dignity? ”

The corners of his mouth rose slightly, and he smiled softly, revealing a different kind of brilliance in his eyes.

"Interesting, in that case, I'll play with you, 'Inheritor'."

"Since you say fair game, then I will find you only as a writer and investigate everything about you."

"I will meet all your challenges head-on until you have nothing to do and your donkey skills are exhausted!"

"You can't catch me, Inheritor!"

"I'll be the winner!"