因式分解2m(x-3)+(x-3) 5(x-y)^3+10(y-x)^2 -ab(x-y)^3+a(y-x)^3-ac(x-y)^3 帮我哦
问题描述：
因式分解2m(x-3)+(x-3) 5(x-y)^3+10(y-x)^2 -ab(x-y)^3+a(y-x)^3-ac(x-y)^3 帮我哦
2m(x-3)+(x-3)
5(x-y)^3+10(y-x)^2
-ab(x-y)^3+a(y-x)^3-ac(x-y)^3
这是3题哦
答
（1）原式＝(2m+1)(x-3)
(2)原式＝5(x-Y)^2[(x-y)-2]
=5(x^2-2xy+y^2)(x-y-2)
(3)原式＝-a(x-y)^3(b+1+c)
=-a(x^3-3x^2y-xy^2-y^3)(b+1+c)