(2a²-2/3a-4/9)x(-9a)整式的乘法
问题描述:
(2a²-2/3a-4/9)x(-9a)整式的乘法
答
2a²x(-9a)+(-2/3ax(-9a))+(-4/9x(-9a))=-18a三次方+6a²+4a
答
(2a²-2/3a-4/9)x(-9a)
=2a²×(-9a)-2/3a×(-9a)-4/9×(-9a)
=-18a³+6a²+4a