C565 Analytic Geometry

"Oh?" Yuan Tiangang frowned, "Your Highness is right. Is it to solve all problems?" He subconsciously felt that Li Xin was bragging.

It had to be known that not only were there hundreds of thousands of variations on the diagrams. Sometimes, two similar diagrams had to use completely different ways of thinking to obtain an answer.

However, Li Xin nodded and said, "It is indeed a problem