(x-3)2-3x(x-3)=0
问题描述:
(x-3)2-3x(x-3)=0
答
(x-3)2-3x(x-3)=0
2x-6-3x·x+9x=0
-3x·x+11x-6=0
3x·x-11x+6=0
(3x-2)(x-3)=0
3x-2=0
x-3=0
x=2/3
x=3