Contact us
Choose a category below so we can get back to you as quickly as possible.
△=A^2-4B=0時,方程有一個解,即方程的解含有一個元素 △=A^2-4B>0時,方程有兩個解,即方程的解含有兩個元素
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.