Xueba, I beg you to go and escort him quickly!

Xu Heng thought it was over like this.

but……

"Ding!"

Yue Pingting sent a message, "Xu Heng, are you free?"

Xu Heng, "?"

PS: Thank you [tail number 3003] for your support!

Kneel for all support!There will be updates later!noon.

Chapter 305

Xu Heng, "What's wrong?"

"A school girl came to me and asked me to help me look at the topic, but it stumped me."

school girl!

So it's the first year of high school!

The topic of the first year of high school stumped Yue Pingting of the second year of high school?

Xu Heng smiled, "Nizi, what's your situation? What's the problem?"

Yue Pingting, "Math problem."

"I'll send you the photo, take a look."

The topic is sent.

圆锥曲线根号下（x2+y2+6x-2y+10）-|x-y+3|=0的离心率是多少？

Xu Heng, "???"

"Are you sure this is a math problem in the first year of high school?"

Yue Pingting, "I checked with her three or four times, and she said it was given by their math teacher!"

"Both hinder the classroom!"

Xu Heng, "*%￥#￥%..."

This is clearly an Olympiad problem!

What do these teachers think?

Was it really stimulated like what Yang Kaixuan said?

Xu Heng spoke directly to Yue Pingting.

“这个原式可以变形成为根号下（x+3）平方+（y-1）平方=|x-y+3|，也就是等于根号2乘以|x-y+3|除以根号2。”

"So, the ratio of the distance from the moving point (x, y) to the fixed point (-3, 1) and the distance from it to the straight line x-y+3=0 is the square root of 2, so the trajectory of the moving point is a hyperbola, so the centrifugal The rate is the square root of 2."

Although the question gave the answer directly, Xu Heng's words were not finished yet.

"This is obviously a question for the Mathematical Olympiad! Don't let them do it!"

"These math teachers are crazy!"

"In the first year of high school and the second year of high school, I will find this kind of problem for the students to do!"

"The third year of high school still has to find those final final questions that are even more difficult, what do you think!"

Seeing Xu Heng complaining so much, Yue Pingting reminded, "Maybe those teachers were stimulated by us?"

Xu Heng, "%￥#@￥%..."

Yue Pingting, "How about we keep a low profile next time?"

Xu Heng, "Is this necessary?"

Yue Pingting, "Eh..."

Xu Heng, "Leave it alone! Let them go! It's better than smashing the pot."

"Sleep, sleep, good night."

Before Yue Pingting hung up the phone, she asked one last question, "What time will we wake up tomorrow! Should I call you?"

Xu Heng, "Just sleep late in the dormitory, and when you wake up, just send me a message, or just come and find me."

Yue Pingting, "I think... 117 earlier... is that okay?"

Xu Heng. "?"

Yue Pingting muttered softly, "It's still more comfortable in the principal's room..."

So fragrant!

Girl!

You fell in love with the sofa and air conditioner in the principal's room, right?

Fine!

Xu Heng yawned, "You can figure it out."

A dreamless night!

When Yue Pingting came to find Xu Heng, everything was as usual, but she didn't wake Xu Heng up.

Until Xu Heng woke up naturally, and when he opened his eyes, Yue Pingting was lying in front of him, staring at him.

Xu Heng stretched his waist, "How long have you been here?"

Yue Pingting, "It's been a while."

Xu Heng, "Then you wait for me, wait for me to get up, have breakfast, and then we will go to the principal's office."

Yue Pingting, "I'm afraid it won't work! Because I saw your phone vibrate several times."

Xu Heng picked up his mobile phone to check. Indeed, there were messages from the principal, Xue Laiyun, and Hong Jingjun.

Everyone has several messages.

The principal, "Student Xu Heng, where are you? Why don't you come to my office? Where have you been?"

"???"

"They're coming!"

"They insisted that you were in my office, and I checked them! If they didn't find you, they insisted that I hid you!"

"I'm speechless right now."

excuse?

There is no excuse!

We were already in your principal's office!

Xue Laiyun asked where Xu Heng was.

As for the Hongjing Army, they sent messages to themselves after five o'clock in the morning.

Xu Heng clearly remembered that they arrived in Yunshan County after eleven o'clock.

From this point of view, they didn't take much rest, and came here full of enthusiasm early in the morning.

Xu Heng didn't reply to anyone's news, so he went to brush his teeth and wash his face.

Yue Pingting handed over the towel.

Xu Heng washed his hair again, and Yue Pingting handed him the shampoo.

good wife!

But so!

Leave the dormitory slowly, and then go to have breakfast.

Yue Pingting looked anxious, "Xu Heng, why don't we hurry up, or... get back a message?"

"I see that the principal has sent you several messages."

Xu Heng waved his hand, "It doesn't matter, just continue to eat our food, and it won't make people safe even after a meal. There is no such thing as the most basic respect. Why should I reply to them?"

Yue Pingting could tell that Xu Heng was making unreasonable words.

on purpose!

Under normal circumstances, don't the students have breakfast at six or seven o'clock?

It's nine o'clock now...

Xu Heng ate comfortably, so he and Yue Pingting went back slowly.

On the way, Xu Heng called the principal back.

"headmaster……"

On the other end of the phone, the principal was very excited, "Little ancestor, you have answered my call! Where are you?"

Xu Heng, "I just finished eating, what's the matter?"

Principal, "The research team is here!"

Xu Heng frowned slightly, "Why did you come in?"

"Old Hong shouldn't be such a person, right? Since he promised me, shouldn't this happen?"

Moreover, what the principal meant, it was obvious that he was forced to do nothing!

These people feel very tough!

Xu Heng didn't think there was anything wrong with the Hongjing Army, he said bluntly, "Do it!"

"That's it! Tell them for me, you come here when you come, what does it have to do with me, I owe them?"

pat!

hang up the phone!

Xu Heng murmured, "I think Mr. Hong didn't stop them, did he?"

Then she dragged Yue Pingting and walked outside the school.

Really!

Xu Heng has his own life to do.

Even the old man insisted on letting Xu Heng maintain his ordinary high school life.

Why should they be aggressive?

Xu Heng wanted to find them for something, but as far as they are concerned, their impression on Xu Heng is very bad!

Yes!

Although they don't put pressure on themselves, the pressure is all on the headmaster!

These people, none of them are good stubble.

Put the pressure on the principal, and let the principal put pressure on Xu Heng.

I'm just sorry, the headmaster has persisted for so long and dealt with them for so long.

At this time, the Hongjing Army also sent a message.

"Student Xu Heng, I'm very sorry, I can't stop that friend of mine!"

Xu Heng was just about to reply to the news from the Hongjing Army.

Hong Jingjun continued to send messages, "I'm still outside your school!"

Xu Heng raised his eyebrows and smiled. He was just passing by the door, and he really saw the Hongjing Army outside.

Outside the school gate, in a car, with the back seat window, Hong Jingjun was holding his mobile phone to send messages to Xu Heng, with an anxious expression on his face.

Sure enough, Xu Heng saw the right person!