Chapter 148

"Sure."

Qin Feng nodded: "If you lose, then you are responsible for helping the tutor wipe the blackboard for a month."

"Haha, that's good."

Upon hearing this, the tutor

smiled happily and nodded at Qin Feng.

Meanwhile, Zhu Yun

also raised her chin toward Qin Feng and said with extreme stubbornness: "Fine, I accept your bet."

Having finished speaking,

Zhu Yun walked to the podium, picked up the chalk, and began to calculate.

All the students present

were now watching the blackboard together with Qin Feng and the tutor, waiting for the final result.

At the very beginning,

Zhu Yun wrote very fast,

but when the solution process reached one-third,

Zhu Yun stopped,

looked back at her own calculation process,

and then her face instantly turned red.

After flipping back and forth to check each of the previous calculation steps one by one,

Zhu Yun knew

that by the step where she had stopped writing,

she had already made many mistakes,

it was simply making a mistake with every single step written.

This situation was exactly what Qin Feng had said.

Zhu Yun's third solution

was wrong from the very start.

It was only because Zhu Yun knew the detailed process and the correct answer to this problem

that she continued to make mistakes while making mistakes,

constantly correcting the values within the erroneous solution process,

and in the end, she actually wrote errors into errors and arrived at the correct answer!

Zhu Yun knew

that she had already made mistakes that were utterly absurd.

But at this moment,

so many pairs of eyes behind her were watching her.

Moreover,

she had just solemnly made a bet with Qin Feng.

If she simply put down the chalk and admitted defeat,

she would definitely be ruthlessly mocked by Qin Feng and the students.

So,

after thinking carefully for a while,

Zhu Yun gritted her teeth,

picked up the chalk again, and continued to calculate on the blackboard...

Seeing that Zhu Yun knew she was wrong but did not correct it,

the tutor frowned slightly.

Afterwards,

meeting Qin Feng's gaze, he smiled helplessly and shook his head.

Among many subjects,

mathematics has the most rigorous requirements.

If it is wrong,

it is wrong.

Even if only one symbol or one unit is wrong,

it will directly affect the final result of the mathematical calculation.

Two minutes later,

Zhu Yun stopped writing again.

She went back and forth to carefully check all of her calculation processes,

knowing that she had already made mistakes to an absurd degree,

but Zhu Yun always felt that her own problem-solving approach had no issues.

Clenching her lips tightly,

Zhu Yun carefully checked the entire calculation process once more.

She finally had to accept her defeat,

and only then let out a light sigh.

Slowly turning around,

he bowed to the instructor and classmates to apologize: "I'm sorry, Teacher. I'm sorry, Qin Feng. I'm sorry, everyone..."

"What Teacher and Qin Feng said is very correct. I made a mistake on this problem from the very beginning, and to correct the calculation process, every step I took afterward was wrong on top of wrong..."

Seeing that Zhu Yun, immediately after realizing her mistake, had bowed to apologize to him and the classmates,

the instructor's attitude was somewhat approving.

He nodded and said, "Classmate Zhu Yun, mathematics indeed requires the spirit of research that doesn't turn back until hitting the southern wall, but not your kind of making mistakes while knowing they are mistakes."

"However, it is good that you have now admitted your mistake and apologized to me and everyone."

"Actually, just as Classmate Qin Feng said, your problem-solving approach is not flawed, but the problem lies in your first step, because your first step was wrong."

The instructor turned his head to look at Qin Feng: "Qin Feng, can you use Classmate Zhu Yun's problem-solving approach to correctly solve this problem?"

"Yes, I can, Teacher."

Qin Feng nodded and walked slowly up to the podium.

Seeing Zhu Yun standing still beside him,

Qin Feng smiled and reminded her, "Classmate Zhu Yun, it's time to wipe the blackboard!"

"I know."

Although Zhu Yun still felt somewhat unwilling toward Qin Feng,

she obediently picked up the blackboard eraser,

and then wiped away her entire problem-solving process.

Next,

55470755

Zhu Yun watched Qin Feng, waiting for him to write out the problem-solving process and the answer.

"Teacher, classmates."

Qin Feng wrote several key data points of the problem on the blackboard,

then spoke loudly: "Although Classmate Zhu Yun's problem-solving approach is feasible, compared to the conventional method, it is, in fact, a bit of a detour."

"To use an analogy, this problem is like going from point A to point B. The conventional method taught by the teacher to the classmates, although the most ordinary, is also the method with the shortest distance and the best road conditions."

"And Classmate Zhu Yun's problem-solving approach is actually going from point A to point C first, then crossing a small path to reach point D, and then crossing the river from point D to go to point B."

"Although this is indeed a problem-solving approach, compared to the conventional method, it involves walking much farther and is much more troublesome."

"Therefore, this kind of approach can be used to show off skills, but its practicality is not great."

As Qin Feng spoke,

he first wrote the conventional problem-solving process on the blackboard,

then,