(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
(2a²-2/3a-4/9)x(-9a)
=2a²×(-9a)-2/3a×(-9a)-4/9×(-9a)
=-18a³+6a²+4a