Question

6(x-y)的三次丰-3y(y-x)的平方,因式分解是多少?

Answer 1

6(x-y)^3-3y(y-x)^2(注：X^3代表X的三次方）

=6(x-y)^3-3y(x-y)^2

=3(x-y)^2[2（x-y)-y]

=3(x-y)^2(2x-3y)