（x-1)²=（2x-1)²（x-1)²-（2x-1)²=0（x-1+2x-1）（x-1-2x+1）=0x(3x-2)=0x1=0 x2=3/2x²-2x+1=4(x-1)²=4x-1=±2x=3或x=-1x²=4xx²-4x=0x(x-4)=0x1=0 x2=4在右上角点击【评价...