太多了,这么多题目,自己也可以做做.
(1)-9ma^3+6ma²-12ma=-3ma(3a²-2a+4),
(2)-4x²-12x²y²+8x^3y²==-4x²(1-2xy²+3y²).,
(3)2(x-y)²-3(y-x)=2(x-y)²-3(x-y)=(x-y)(2x-2y+3),
(4)5(x-y)^3+10(y-x)² =5(x-y)^3+10(x-y)²= 5(x-y)²(x-y+2)
(5)(b-a)²+a(a-b)+b(b-a) =(a-b)²+a(a-b)-b(a-b)
=(a-b)²+(a-b)(a-b) =2(a-b)²
(6)18(a-b)^3-12(b-a)^4=18(a-b)^3-12(a-b)^4=6(a-b)^3*(3-2a+2b),
(7)x(x+y)(x-y)-x(x+y)²=(x+y)(x²-xy-x²-xy)-=-2xy(x+y) ,