①3x²-5x=0
x(3x-5)=0
②3(x-1)²=x(x-1)
(x-1)(3x-3-x)=0
(x-1)(2x-3)=0
③（y-2)²=(3y+1)²
(y-2+3y+1)(y-2-3y-1)=0
(4y-1)(2y+3)=0
④(x+2)(x-5)=8
x²-3x-18=0
(x-6)(x+3)=0