(7a²-2/3a+5/9)×(-9a)
问题描述:
(7a²-2/3a+5/9)×(-9a)
答
(7a²-2/3a+5/9)×(-9a)
=-63a³+6a²-5a
(7a²-2/3a+5/9)×(-9a)
(7a²-2/3a+5/9)×(-9a)
=-63a³+6a²-5a