Contact us
Choose a category below so we can get back to you as quickly as possible.
[-B±根號(B平方-4AC)]/2A 根號和平方打不出來,所以只能這樣了 這不是二次函數的公式,這是二次方程得求根公式 從二次函數上來說,若與x軸有交點,引數取這個值的時候函數值為0
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.