Lin Feng looked at the Drunken Wind Building in front of him, and sighed, he didn't expect that he would return to this place in less than a day, if this kind of thing hadn't happened, I'm afraid it would take a long time to return to this place again, Lin Feng really didn't know whether to thank Qinglan Sect or hate Qinglan Sect.

It was useless to think about it, Lin Feng walked into the tavern again, with the token in his hand, it was much easier to get things done, and it didn't take long for someone to report that their young lady had allowed him to see him.

Lin Feng walked the familiar road again, and after a while, he came to Shen Lengxin's door and knocked lightly.

"Come in!"

It's still that quiet and cold voice.

Lin Feng opened the door, and what caught his eyes was still the beautiful and beautiful cold fairy who was not moved by foreign objects, Lin Feng coughed dryly, touched his nose, opened his mouth, and didn't know what to say. At the beginning, he was leaving, but in less than a day, he came back, which didn't make him feel embarrassed?

Shen Lengxin didn't think about it so much, didn't ask Lin Feng what the reason was, just said directly, "You should teach me the rest of the content!"

And the usual commanding tone.

Lin Feng smiled bitterly again, and at the same time, he was a little disappointed in his heart, why didn't Shen Lengxin ask him why he came back so soon?

However, Lin Feng also quickly adjusted his mentality and directly explained to Shen Lengxin his method of solving the one-dimensional quadratic equation.

"Your last question, an antique store sells a batch of antiques, an average of 20 pieces can be sold per day, each piece of profit 40 taels of silver, in order to expand sales and increase profits, as much as possible to reduce inventory, the shopkeeper decided to take appropriate price reduction measures, after investigation, it was found that if the price of each antique is reduced by one tael, the market can sell 2 more pieces per day, if the average daily profit of the mall is 1200 silver, how many taels of silver should be reduced for each antique?"

"This problem is one of the more common problems in the one-dimensional quadratic equation, and we can assume that the price of each antique should be reduced by x two pieces of silver. ”

According to the title, get (40-x) (20 + 2x) = 1200, finish, get x2-30x + 200 = 0. x2 is an exponentially quadratic unknown, and there are often two answers to such unknowns. ”

．．．．．．

Lin Feng explained the method of solving the one-dimensional quadratic equation to the other party, and unconsciously, time passed in a hurry, and when Lin Feng finished explaining and reacted, it was almost evening, and he knew that he was embarrassed to stay here now, so he had to say to Shen Lengxin, "Leng Xin, I'll go out first, you can slowly experience it yourself, if there is anything you don't understand, you will sue me tomorrow." ”

After speaking, Lin Feng left Shen Lengxin's room.

Fortunately, there are still some empty rooms in the tavern here, so Lin Feng doesn't have to stay elsewhere.

Shen Lengxin looked at the manuscripts in his hand that Lin Feng had solved, clenched slightly, those papers were crushed because he couldn't withstand this force, Shen Lengxin lifted the broken pieces lightly and scattered them in the air, Shen Lengxin looked out the window and asked coldly, "Old He, what happened after he returned to the sect?"

shout

A place in the room suddenly distorted, and then, a terrifying energy overflowed from the distorted space, an old figure walked out of it, the energy around the body spread, the tables and chairs in the room shook involuntarily, and then the energy converged, and the room was suddenly silent, as if what had just happened was just an illusion.

I don't know when, the bright moon has hung high in the night sky, the moonlight shines in from the window, imprinted on the face of the old figure, this is an ordinary old man with a red face, at this time, he is looking at Shen Lengxin in front of him with loving eyes, and he laughed and said, "Miss, that kid was abandoned by his sect." ”

Shen Lengxin turned around and asked suspiciously, "Abandon?"

He Lao smiled, and gave Shen Lengxin a detailed statement of Lin Feng's offending of the Hundred Immortal Sect, since he wanted to protect Shen Lengxin, of course He Lao had investigated Lin Feng's information in detail, it can be said that except for those more secret things that no one knew, such as what happened to Lin Feng and Miao Wuqing in the back mountain, how Lin Feng had such a strong strength, He Lao investigated.

When he saw these materials for the first time, he couldn't help but be surprised, he knew that Lin Feng's strength was extraordinary, but he didn't expect that Lin Feng had only cultivated to the first level of Xuanqi apprentices a month ago, and several second- and third-level Xuanqi apprentices had been beaten half to death. How did Lin Feng raise his strength to the level of a Xuan General in this month's time?

Speaking of this, He Lao is also a little curious, yes, just curious. With his experience over the years, he has seen a lot of such things, and even he has seen someone who can cultivate to jump three realms in a row in one day, of course, it is only in the early stage, but this is also a very remarkable thing, but what about the future?

It's not the same as other people, no, it's even inferior to others, because he is someone else's work, although the early effect is very good, but the more you go to the back, the more difficult it is to break through the bottleneck, and you will never be able to reach the realm of the real strong, which is the disadvantage.

"Oh. Shen Lengxin sighed, she was a little surprised by Lin Feng's transformation against the sky, and there weren't too many emotional changes, maybe she was used to it, or maybe she didn't want to have emotional fluctuations, and then said lightly, "Destroy that Hundred Immortal Sect and Qinglan Sect." ”

When He Lao heard Shen Lengxin say this, he couldn't help but be stunned, and then he was overjoyed, he didn't expect that Shen Lengxin would directly have the idea of destroying the two sects because of this matter, this was obviously angry for Lin Feng, this was a good thing, of course he was happy.

However, happy to be happy, but it is impossible for him to do it, not that they don't have the strength to destroy these two sects, as long as he casually sends out a person to complete this task, but in this way, it is easy to attract the attention of other hostile forces, which may not be much pressure on him, but there is a Shen Lengxin by his side who is more important than his life, it is impossible for him to take such a risk.

He Lao smiled bitterly and said, "Miss, I'm afraid it's not appropriate to do this." ”

Shen Lengxin looked at He Lao with a puzzled look again, and did not speak, because she knew that He Lao would continue to explain.

"Miss, I'm afraid that you will make that kid unhappy by doing this, although I have only met that kid twice, but according to the information I have, I know that that kid is a person with strong self-esteem, and I believe that he wants to solve this problem with his own hands, not in the hands of others, even if it is you, Miss. ”

Hearing He Lao say this, Shen Lengxin frowned and said lightly, "Will it make him unhappy?" ”

He Lao also breathed a sigh of relief, he was really afraid that Shen Lengxin would stubbornly destroy these two sects, but he was also secretly envious of Lin Feng, and the person who could make Miss do this was probably the only one who could do this.

(The second one is sent, I hope you don't mind.) ）