(x-3)²-(x-3)=12用因式分解法
问题描述:
(x-3)²-(x-3)=12用因式分解法
答
(x-3)²-(x-3)=12
(x-3)^2-(x-3)-12=0
[(x-3)-4][(x-3)+3]=0
(x-7)(x)=0
x1=0
x2=7