Assistant Zhou was envious, jealous and hateful.

In this era of looking at faces, why didn't he have a beautiful, kind and smart girl to give him a lecture when he was in school!!

To arrive at the final answer, one needs to solve a one-dimensional quadratic equation, and Yi Rin is accustomed to using the formula method to solve it.

Knowing the answer, he looked up at the man next to him who was sipping Coke.

Zhou Zheng inexplicably felt that his child's expression was a bit like a husky begging for praise.

Su Nian nodded, and a smile appeared on Yi Rin's lips, finally not too embarrassed. He picked up the Coke he had in his hand and took a sip, suddenly feeling that this thing was not so unpleasant.

"There's an easier way to solve it." Su Nian said leisurely.

Belch......

The smile on Yi Rin's face froze.

So, he's still ashamed, isn't he?

Su Nian picked up the pen and wrote the cross multiplication method next to his formula, "This method is simply that the multiplication of the left side of the cross is equal to the quadratic term, the multiplication of the right side is equal to the constant term, and the cross multiplication and addition are equal to the primary term." In fact, it is to use the inverse operation of the multiplication formula (x+a)(x+b)=x²+(a+b)x+ab to perform factorization. ”

She demonstrated as she spoke, the steps were clear and clear, and the answer came out after writing.

The speed is several times faster than Yi Rin.

"It turns out that it can be like this, Su Nian, you are really amazing." Yi Rin reluctantly showed himself a smile that suddenly dawned on him, he was embarrassed and not embarrassed, he had seen a lot of big scenes, and no matter how panicked he was, he couldn't show it.

Seeing that he was happy, Su Nian also smiled, and took out the bag that had been placed behind the seat at the beginning, "That ......"

I always feel embarrassed to say it.

Seeing the familiar pattern, Yi Rin's smirk finally became a little more real, "For me?" ”

Just asked so politely, it was obvious that this was for him, he likes pandas, and fans will use similar bags with panda patterns to give gifts.

Su Nian nodded and handed him the bag.

Yi Rin politely asked, "Can you see it?" ”

What's inside? I'm a little curious!

Su Nian nodded again.

Yi Rin held a stack of photos of himself in his hand, and looked at Su Nian with some uncomfortable expressions.

What does it mean?

Su Nian: "Can you help me sign it?" ”

It's not easy to ask this sentence, and I'll never do this kind of thing for chicken legs again.

"Absolutely." Yi Rin grabbed the pen in his hand and began to sign one by one, bowing his head to hide his complicated expression.

He was in a complicated mood now, thinking that she was not his fan, but looking at it like this, she was obviously a fanatical fan.

Why did you behave so coldly before, probably embarrassed.

He quickly wrote a dozen and continued without stopping.

Su Nian hurriedly stopped, "It's okay, it's okay, that's enough, it's too much, you don't have to sign it." ”

When she promised Li Mingjia, she only planned to help her ask for an autographed photo, and now the girl has earned it.

Yi Rin wrote two more before stopping, seeing Su Nian staring at those signed photos with a satisfied look, he suddenly asked, "Do you want to take a group photo?" ”

Su Nian: "Ah..." was a little confused, Li Mingjia said that Yi Rin was a cold person, and the information was obviously wrong.

"Brother Zheng." Yi Rin handed the phone to Zhou Zheng, his head slightly tilted towards Su Nian, and there was a hint of a smile on the corner of his mouth.

Su Nian looked at him slightly, with a hint of ignorance in his eyes.

When she looked at the camera, Zhou Zheng had already taken seven or eight photos quickly, and she was very modest, "Take a few more photos, you choose what you like to stay." ”

In fact, he thinks it's all very good, so it's a symbolic politeness.