问题
解答题
3(x-2)2=x(x-2)(用因式分解法)
答案
3(x-2)2=x(x-2)
3(x-2)2-x(x-2)=0
(x-2)[3(x-2)-x]=0
(x-2)(2x-6)=0
x-2=0或2x-6=0
∴x1=2,x2=3.
3(x-2)2=x(x-2)(用因式分解法)
3(x-2)2=x(x-2)
3(x-2)2-x(x-2)=0
(x-2)[3(x-2)-x]=0
(x-2)(2x-6)=0
x-2=0或2x-6=0
∴x1=2,x2=3.