用因式分解法3(x-3)=(x-3)^2

问题描述:

用因式分解法3(x-3)=(x-3)^2

3(x-3)=(x-3)^2
3(x-3)-(x-3)^2=0
[3-(x-3)]*(x-3)=0
(6-x)*(x-3)=0
所以x=6或x=3