"What's wrong?" Seeing that Su Cheng didn't speak for a long time, Jiang Yifei asked.

"Oh oh it's okay, what, what a subject. ”

"That's it. ”

Su Cheng took the scroll and looked at it, fx equals...

He couldn't even read the things in the back.

"Don't you know how to do this?" asked Su Cheng rhetorically.

"Well..."

"What is your train of thought, tell me first. ”

"My idea: I just solve a binary quadratic equation, get the coordinates, draw a plot and find the corresponding position on the graph, and then come up with a new function. But my final answer was wrong. ”

"Oh... Ahh So why do you want to solve it in the way of binary quadratic equations?"

"Because... This is the problem of binary quadratic equations. Jiang Yifei looked confused.

"Well... Oh yes... Kindness... You do this, you start from scratch and do it all over again. ”

"Do it again?"

"That's right, this will deepen your impression, and if I tell you how to solve the problem directly, you may not be able to draw inferences in the future. ”

"Okay. Jiang Yifei didn't think much about it, and even agreed with Su Cheng's words a little.

She took a piece of scratch paper and quickly solved the binary quadratic equation to get the answer and form the coordinates.

"Are you sure you're not wrong with this answer?" Su Cheng looked inscrutable.

Jiang Yifei carefully checked it twice, "I'm sure it's right." ”

"Then the next step, let's draw. ”

Jiang Yifei quickly drew the picture, "What's next?"

"What do you say?"

"Oooh. Jiang Yifei began to look for points on the map, but Su Cheng didn't understand what she was doing.

"I'm done. ”

"Are you sure?"

"Sure. ”

"Next. ”

Jiang Yifei connected the dots, "This is a linear function, right?"

"Don't ask me, ask yourself, what do you think, keep doing it. ”

Jiang Yifei nodded, continued her problem-solving process, and soon she listed a complex equation, and then calculated and came up with an answer, "It's still not right." ”

Sioux City glanced at her answer, which was 3.

"What's the correct answer?"

“9。 ”

"That's three times worse. Su Cheng said in his heart, "Come on, you try to push it back." ”

"Push back?"

"That's right, because you still can't find your own problem after doing it all over again, then let's push it back, and you can use the answer 9 to push it back now. ”

"But just knowing that the answer can lead to many possibilities, Su Cheng, if you don't calculate it first, could it be that the answer is wrong?"

"The answer... It's unlikely to be wrong. Su Cheng took the test paper and looked at it pretentiously.

"Give you the pen. ”

"No, I can calculate this kind of problem by mental arithmetic. ”

"Can you do mental arithmetic?" Jiang Yifei looked at Su Cheng with some shock.

"Yes, that's a small thing. Su Cheng said shamelessly, and then he looked at the question with a confused expression, "When I was in high school, I was able to understand these magical symbols?

Su Cheng stared at the question for three to five minutes, feeling that the time was about the same, and pushed the test paper back, "The answer is no problem..."

"Da-da-da-da. Just then, Sioux City heard the sound of high heels, and then a middle-aged woman walked in.

This is the math teacher of the key class, and I don't know why, Sioux City has a very bad premonition.

"Students, pay attention, the last big question in the test paper yesterday, the correct answer is written 9, just now some students and I responded that there is a problem with the answer, I just calculated it, this answer is indeed wrong, it should be 3. Everyone, pay attention, tomorrow I will explain this paper to you. ”

Are you me again?

The corners of Su Cheng's mouth began to rise, and then the angle became larger and larger, "Hahahahahahaha ”

"Su Cheng, what are you laughing at?" Jiang Yifei said blankly.

What the can I do but laugh now!

"Hahahahaha. I... Hahahaha, I'm laughing... Hahahahaha Su Chengxiao's stomach hurt, "Oh, I'm going to laugh at me, hahahahahaha..."

"Su Cheng, are you okay?" Seeing that Su Cheng's smile was a little perverted, Jiang Yifei asked uneasily.

"It's okay, it's okay, I'm just... I finally wanted to tease you, but I didn't expect it to be debunked so quickly. ”

"Tease me?"

"Yes, I see that you know every day that sitting there doing questions is boring, so I want to tease you, in fact, I have already found out that the answer is wrong. ”

"The answer is wrong?" Jiang Yifei glanced at the test paper, then at Su Cheng, and then took out another test paper from the table, "This is yesterday's test paper, and the teacher said that the answer to the last question of this test paper is wrong." This is my own extracurricular practice paper..."

Embarrassing not?

Su Cheng looked at Jiang Yifei and blinked blankly, "Hahahahaha, hey, my kidney hurts, I'll go to the bathroom..."

Sioux City really can't afford to continue making it up, it's too embarrassing...

Jiang Yifei couldn't help but wonder when she saw Su Cheng running away, "What does Su Cheng mean?"

In fact, even so, Jiang Yifei did not suspect Su Cheng. What Su Cheng didn't know was that because Jiang Yifei had watched his two videos and felt his maturity in contact with him, he had always had a good impression of him. Jiang Yifei has long found that she is a little nervous, so no matter what she does, as long as she doesn't hurt her, she won't change her image in her heart too much.

As for whether Su Cheng wouldn't do this question at all, Jiang Yifei didn't think about it in any direction at all. She believed that Sioux City was different, because she had already decided so.

After running out for a while, Su Cheng slowly precipitated the embarrassment in his heart.

"Senior?"

"Sioux City Senior?"

"Huh?" Hearing someone call him, Su Cheng turned around, "Xu Xiaoxiao?"

Xu Xiaoxiao is the dog's sister.

"It's really you. ”

"Why are you here?"

"I'm a freshman this year. ”

Su Cheng glanced at the other party's school uniform, "What a coincidence." ”

"Yes, the senior is so powerful. ”

"Amazing?

"The senior is so good at photography, I didn't expect the grades to be so good. ”

"Wherever you are, you can only take the first place in the school. Anyway, why are you here? Isn't the first year of high school supposed to be in the building opposite?"

"I'm coming to my cousin. ”

"Your cousin is also in our school?"

"Well, he's upstairs, by the way, senior, since everyone is in the same school, why don't you leave a contact information. If you encounter any problems in your studies in the future, I will ask you. ”

"Teach me, hahahahahaha..."

"What's wrong with the senior?"

"It's okay, it's okay, that, leave the number. ”

The two separated after leaving each other's numbers, and Su Cheng lost his name, so he put away his mobile phone, after all, you can't be too high-profile with your mobile phone at school, even if you are the first in the school, the rules and regulations of the school are there. And he, the first in the school, is destined to be just a flash in the pan.

But as soon as the phone was put in his pocket, a call came.

Sioux noticed that it was a strange call and found a corner to answer, "Hey, who... What do you say!"

Sioux City was shocked...