Question

分解因式；3(x-y)-9(y-x)^2；2x^2(x+y)-3y(y+x)^2; 2x^2(m-n)^5-xy(n-m

Answer 1

分解因式；3(x-y)-9(y-x)^2=3(x-y)(1-3x+3y)；

2x^2(x+y)-3y(y+x)^2=(x+y)(2x^2-3y^2-3xy);

2x^2(m-n)^5-xy(n-m)^4=x(m-n)^4*(2xm-2xn-y)