The school beauty is aloof? Whatever, she has a younger sister.

Chapter 178 I really know how to do this question.

The next day, math class.

The classroom was quiet, with only the sound of chalk scratching across the blackboard.

Zhang Muchen had his head down, seemingly staring at his notes, but his hand was actually secretly reaching into the desk drawer to operate his phone.

The screen was lit up; he was chatting with Director Wang's brother.

After leaving Director Wang's house that day, he took the opportunity to add the cat cafe owner on WeChat.

The other party was very enthusiastic; as soon as they added me, they sent me a string of cat photos.

Ragdoll, American Shorthair, Garfield, tabby cat...

The fluffy little thing nestled on the cat shelf, as soft as a ball of cotton.

Zhang Muchen clicked on each one and looked at them one by one, his gaze extremely serious.

To win over Xu Ranxi, a cat needs to be good-looking, and ideally, it should also have a story behind it.

For example, they are abandoned by their owners and end up on the streets.

"To catch someone, you must first capture their heart." Zhang Muchen stroked his cheek with his fingertips, a slight smile playing on his lips.

However, just as he was looking down at a cat carefully choosing one, he suddenly caught a glimpse of a sticky note slipping in from the side.

He looked up and met Chu Jiuli's beautiful, expressionless face.

Yes, he remains as silent as ever.

Zhang Muchen was used to it and knew that this was Chu Jiuli's way of communicating in class.

He glanced down at the sticky note, which contained only a simple sentence: Study hard.

Tsk, the school inspector is here.

Zhang Muchen understood immediately, picked up a pen and wrote a large "OK" on the back of the sticky note, then casually put it back on the corner of her desk.

Chu Jiuli glanced at it, then deftly pinched the sticky note and tucked it into the desk drawer.

After that, she looked up again and threw herself into her studies.

However, as she was taking notes, her eyes suddenly caught sight of Zhang Muchen beside her.

The man kept his head down, his eyes still fixed on the desk drawer...

Still secretly looking at her phone.

Chu Jiuli frowned slightly, a hint of doubt appearing in her eyes.

Zhang Muchen's attitude towards studying these past few days has impressed her, so why is she back to her old ways today?

She stretched out her long, slender, fair fingers and gently tapped Zhang Muchen's desk.

"Attend the lecture," she rarely reminded him.

"Oh, I know the answer to this question, no need to listen." Zhang Muchen didn't even look up.
Chu Jiuli: "..."

She stopped writing, turned her head to look at him, and a flicker of emotion finally appeared in her eyes.

You have to think carefully to solve this problem.

You say you can?

You're better than me now?
"This question is very important; it will be on the exam," Chu Jiuli reminded her again.

"Classmate, I really do... You have to believe me." Zhang Muchen said helplessly.

Just as Chu Jiuli was about to retort, a cold, harsh voice came from the podium: "You boy in the last row, stand up! What are you saying down there? Do you even know the answer to this question?"

Zhao Tao's cold voice interrupted their conversation.

The classroom fell silent instantly.

Everyone looked up, their gazes all falling on Zhang Muchen in the last row.

Some people watched the spectacle, some chuckled, and others looked on with pity.

Math teacher Zhao Tao was the new math teacher for the second year of high school after Liu Wuyang left the school.

He was nearly forty years old, wore silver-rimmed glasses, had deep wrinkles between his brows, and had a rather strict coaching style.

Chu Jiuli's expression visibly froze when she heard Zhao Tao call out Zhang Muchen's name. This time, it really wasn't Zhang Muchen's fault.

She pursed her lips slightly, preparing to raise her hand to explain.

But just then, Zhang Muchen suddenly looked up and said calmly, "Teacher, I know how to do this problem."

Zhao Tao raised an eyebrow: "I haven't even explained the question yet, and you already know it?"

“This question is very simple,” Zhang Muchen added unhurriedly.

The air in the classroom instantly became still.

Zhang Muchen's voice wasn't loud, but everyone in the class thought it was deafening.

Simple?
This is supposed to be the final, most challenging question, right?

Someone couldn't help but chuckle softly. Soon, laughter rose and fell from below.

Zhao Tao frowned, glanced at the seating chart posted on the lectern, and asked in a deep voice, "Zhang... Zhang Muchen, right? You're very good at math?"

He had just taken over the class and didn't have much of an impression of Zhang Muchen, the student.

At this moment, Chen Hao, the sycophant, lowered his voice and said with a smile, "Teacher, he got forty on the math exam last month."

Upon hearing this, Zhao Tao's face instantly darkened: "Come up here and solve it now. If you can't, you were just wasting everyone's time, and you'll be standing at the back blackboard for the rest of the semester."

"Oh."

Zhang Muchen gave a nonchalant reply and glanced at Chen Hao. His gaze held no anger, but rather a look of disdain, as if he were looking at a clown. Then, expressionless, he walked to the podium and began to solve the problem slowly and deliberately with the chalk in hand.

Below the podium, Wang Shishi rested her chin on her hand and muttered softly, "Is this guy crazy or does he really know how to do it?"

While he was still confused, Zhang Muchen's voice carried calmly throughout the classroom.

"This is an analytical geometry problem. The goal is to find the midpoint of a line segment formed by two points on an ellipse, and the intersection of the perpendicular bisector of this line segment with the ellipse," Zhang Muchen explained as he wrote the formulas.

Zhao Tao, who was standing to the side, was stunned for a moment.

You student, why are you lecturing when I'm asking you to solve a problem?
"For the first question, we need to determine the range of values ​​for A and B. N is the midpoint of AB, and its coordinates are given as (1, 3). So we can assume A(x, y) and B(x, y), and apply the midpoint coordinate formula."

"A and B lie on the ellipse. Let's substitute the equation of the ellipse."

"We need to find x and the range of x, and then we will use a symmetric transformation."

"."

The classroom gradually quieted down, and the scratching sound of chalk against the blackboard was particularly clear.

Zhang Muchen's blackboard writing was very neat, and the steps were clear at a glance.

Zhao Tao, who had been standing with his arms crossed, shifted slightly, and his gaze sharpened.

Below the podium, Chu Jiuli stared at the problem, her eyes trembling slightly, filled with disbelief. She could understand it, and she could solve it. But she would never explain and write at the same time like Zhang Muchen, without even pausing.

"The second question is to determine whether A, B, C, and D can form a circle. The method is to use the definition of the perpendicular bisector."

"As long as CD and the perpendicular bisector of AB intersect at a single point, the symmetry of these four points already determines that they are concyclic."

"."

Ten minutes later, Zhang Muchen put down the chalk, flicked his palm lightly with his fingers, and shook off the chalk dust.

"Teacher Zhao, I'm done explaining," he said.

Zhao Tao stood to one side, staring at the solution process on the blackboard without saying a word.

After a full three seconds, he slowly spoke: "All correct."

There was silence in the classroom for a moment.

"Well said." Zhao Tao nodded, his tone finally softening slightly. "Let's go back."

Zhang Muchen clapped his hands, turned around and glanced at the faces that were shocked, stunned, or incredulous, before finally fixing his gaze on Chu Jiuli.

He raised an eyebrow and a faint smile appeared on his lips, as if to say: "Classmate, I wasn't lying to you, was I? I really know the answer to this question."

Chu Jiuli stared blankly at him, her slender fingers gripping the pen tightly.

(End of this chapter)