(2)(x-1)(x-1+2x)=0
(x-1)(3x-1=0
x-1=0或者3x-1=0
x=1或者x=1/3
(3)2x^2-4x+2=3
2(x-1)^2=3
(x-1)^2=3/2
x-1=±√(3/2)
x1=√(3/2)+1X2=1-√(3/2)
(4)-3x^2-4x+4=03x^2+4x-4=0(x+2)(3x-2)=0x=-2或者2/3
(5)3x(x-1)=2-2x3x^2-3x+2x-2=03x^2-x-2=0(-x+1)(-3x-2)=0x=1或者-2/3
(6)(x-1)(x+2)=70x^2+2x-x-2=70x^2+x-72=0(x-8)(x+9)=0x=8或者-9
(7)x(x+6)=7x^2+6x-7=0(x-1)(x+7)=0x=1或者-7
(8)(3-x)^2+x^2=99-6x+x^2+x^2=92x^2-6x=02x(x-3)=0x=0或者x=3