> 数学 >
已知x-3y=0,求(x²-2xy+y²/x-y)-2y的值
人气:160 ℃ 时间:2020-05-10 06:03:06
解答
(x²-2xy+y²)/(x-y)-2y
=[(x-y)²/(x-y)]-2y
=(x-y)-2y
=x-3y
=0
推荐
猜你喜欢
© 2025 79432.Com All Rights Reserved.
电脑版|手机版