单项式乘多项式
-7m·(m^3-3n^2)=(-2x^2)·(x^2-2x-1/2)=(5a^2-4/9a+1)·(-3a^2b)=(-2x^2)·（x^2-2x-1/2)=急！~~~...
-7m·(m^3-3n^2)=
(-2x^2)·(x^2-2x-1/2)=
(5a^2-4/9a+1)·(-3a^2 b)=
(-2x^2)·（x^2-2x-1/2)=
急！~~~~~~~~~~~~~~ 展开
(-2x^2)·(x^2-2x-1/2)=
(5a^2-4/9a+1)·(-3a^2 b)=
(-2x^2)·（x^2-2x-1/2)=
急！~~~~~~~~~~~~~~ 展开
2个回答
展开全部
-7m·(m^3-3n^2) = -7m^4+21mn^2
(-2x^2)·(x^2-2x-1/2) = -2x^4+4x^3+X^2
(5a^2-4/9a+1)·(-3a^2 b) = -15a^4 b+4/3a^3 b-3a^2 b
(-2x^2)·（x^2-2x-1/2) = -2x^4+4x^3+x^2
(-2x^2)·(x^2-2x-1/2) = -2x^4+4x^3+X^2
(5a^2-4/9a+1)·(-3a^2 b) = -15a^4 b+4/3a^3 b-3a^2 b
(-2x^2)·（x^2-2x-1/2) = -2x^4+4x^3+x^2
本回答由提问者推荐
已赞过
已踩过<
评论
收起
你对这个回答的评价是？
推荐律师服务：
若未解决您的问题，请您详细描述您的问题，通过百度律临进行免费专业咨询
