> 数学 >
(x-2y+3z)(x+2y-3z)
人气:296 ℃ 时间:2020-02-06 02:11:23
解答
(x-2y+3z)(x+2y-3z),
=x2-(2y-3z)2
=x2-(4y2-12yz+9z2),
=x2-4y2+12yz-9z2
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版