3(x-3)-(x-3)^2=0用因式分解法怎么解

问题描述:

3(x-3)-(x-3)^2=0用因式分解法怎么解

3(x-3)-(x-3)^2=0
(x-3)[3-(x-3)]=0
(x-3)(6-x)=0
x-3=0 6-x=0
x1=3 x2=6