(x的3次方-3x的2次方y+3xy的2次方)-(x的3次方-3x的2次方y-3xy的2次方-y的3次方)

2024-12-16 12:31:30
推荐回答(1个)
回答1:

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