The homeroom teacher had a look of disdain on her face when Qin Shu came up with the question. Did they think her teaching certificate was fake?
When she looked at the question on the blackboard, she was stunned once more.
This question...
The students below looked at the question on the blackboard and were stunned for a moment because they seemed to have seen this question before but did not know how to solve it.
Jiang Yu stared at the question for a long time and couldn't figure out how to solve it. He turned around and asked Fu Tingyan, "Tingyan, do you know how to solve that question?"
Fu Tingyan had been watching as Qin Shu wrote down the question. He could say that he knew how to answer the question, but he could also say that he didn't know how to.
He knew how to because he knew the formulas used in the first half of the question like the back of his hand.
