(1)2x²+x=0 (2)x(x-2)+x-2=0 (3)3x²+5x=0 (4)5x²-2x-0.25=x²-2x+0.75(1)x²-100=0 (2)(x-1)²-4x²=0 (3)(x-4)²=(5-2x)²