用因式分解法解方程x2-2x-35=0
问题描述:
用因式分解法解方程x2-2x-35=0
答
x2-2x-35=0
(x-7)(x+5)=0
x1=7 x2=-5
答
x^2-2x-35=0
(x-7)(x+5)=0
x1=7 x2=-5