> 数学 >
x2-6x+9/x2-4 x2-4x/x2-8x+16 2是平方 /是分数线
人气:113 ℃ 时间:2020-06-13 17:11:12
解答
x2-6x+9/x2-4
=(x-3)²/(x+2)(x-2)
x2-4x/x2-8x+16
=x(x-4)/(x-4)²
=x/(x-4)
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版