Contact us
Choose a category below so we can get back to you as quickly as possible.
方程式1:x^2+2x+2a=0和方程式2:x^2+2(2-a)x+4=0有且只有一方程式有兩個不等相等實根,指兩個方程式中,一方程式有解且只有異根時,=4-8a,方程式二:△=4(a-2)^2-16=-4[(a-2)^2-4]有兩...
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.