> 数学 >
(3m-2n)(9m-6n)
人气:376 ℃ 时间:2020-03-28 05:46:41
解答
原式=3(3m-2n)²
=3(9m²-12mn+4n²)
=27m²-36mn+12n²
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版