x（2x-2)=122x^2-2x=12x^2-x=6x^2-x-6=0(x-3)(x+2)=0所以x=3或x=-2
x(2x-2)=12x(x-1)=6x-²x--6=0(x-3)(x+2)=0得x=3或x=-2
x（2x-2)=122x^2-2x-12=02(x-3)(x+2)=0
2x^2-2x-12=0x^2-x-6=0(x-3)(x+2)=0x=3 x=-2
