> 数学 >
先化简,再求值:{(x+2y)(x-2y)+4(x-y)²}÷6x,其中x=12,y=3.
人气:235 ℃ 时间:2020-02-05 03:00:18
解答
{(x+2y)(x-2y)+4(x-y)2}÷6x
=(x²-4y²+4x²-8xy+4y²)÷6x
=(5x²-8xy)÷6x
=(5x-8y)÷6
=(5×12-8×3)÷6
=(60-24)÷6
=36÷6
=6
祝你开心
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版