(3a十4b)(3a一4b)谢谢了,
问题描述:
(3a十4b)(3a一4b)谢谢了,
答
(3a十4b)(3a一4b)
原式=(3a)²-(4b)²
=9a²-16b²
楼主,我也是初一的学生,老师之前才教过,我写的不会错的,请采纳我吧,O(∩_∩)O谢谢!