分解因式1,x(a-x)(a-y)-y(x-a)(y-a)2,a(x+y-z)-b(z-x-y)-c(x-z+y)请给出详细的解题过程!谢谢!

Question

分解因式1,x(a-x)(a-y)-y(x-a)(y-a) 2,a(x+y-z)-b(z-x-y)-c(x-z+y)
请给出详细的解题过程!谢谢!

Answer 1

1,x(a-x)(a-y)-y(x-a)(y-a) =x【-(a-x)】【-(a-y)】-y(x-a)(y-a)=x(x-a)(y-a)-y(x-a)(y-a)=)=(x-y)(x-a)(y-a）
2,a(x+y-z)-b(z-x-y)-c(x-z+y)=a(x+y-z)+b(x+y-z)-c(x+y-z)=(x+y-z)(a+b-c)