(1)x(x-3)=2(x-3);(2)(x-3)²+2x(x-3)=0.

问题描述:

(1)x(x-3)=2(x-3);(2)(x-3)²+2x(x-3)=0.

(1)
x²-3x=2x-6
x²-5x+6=0
(x-2)(x-3)=0
X1=2,X2=3
(2)
x²-6x+9+2x²-6x=0
3x²-12x+9=0
x²-4x+3=0
(x-1)(x-3)=0
X1=1,X2=3