> 数学 >
(m-2n)(2n+m)-(-3m-4n)(4n-3m)=
人气:435 ℃ 时间:2020-02-03 19:41:52
解答
(m-2n)(2n+m)-(-3m-4n)(4n-3m)
=m^2-4n^2+16n^2-9m^2
=-8m^2+12n^2
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版