> 数学 >
a^2-4b^2/a^2+2ab+b^2`a^2+ab/a+2b怎么做?
人气:459 ℃ 时间:2020-05-22 16:51:20
解答
=(a+2b)(a-2b)/(a+b)²×a(a+b)/(a+2b)
=a(a-2b)/(a+b)
=(a²-2ab)/(a+b)
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版