Chapter 659: Spike Zhang Konghui
An angry expression appeared on Zhang Konghui's delicate face, and he opened an examination question directly: "Suppose fx=x squared and multiplied by... find the value of f-x."
He said while writing down the test questions on a piece of paper. Judging from the writing speed, Zhang Konghui was very angry.
"The answer is 3."
"Forget it...what?"
Just after Zhang Konghui finished writing, he was about to straighten up and let Li Yun do the question, but he suddenly heard the answer is 3?
"I have already figured it out, and the answer is 3." Li Yun repeated it again.
"How is it possible, I just finished writing!"
Zhang Konghui's whole person is going to be petrified.
The question he was dealing with was difficult, but it was definitely not easy. Without a written calculation, he himself estimated that it would take a few minutes to think about it to get the answer.
But Li Yun almost figured it out in three seconds? ! It's unbelievable!