> 数学 >
9(x-y)^2-(x+y)^2因式分解
人气:241 ℃ 时间:2020-04-11 10:53:40
解答
9(x-y)^2-(x+y)^2 = [3(x-y)]^2 -(x+y)^2 = [3(x-y)+(x+y)]*[3(x-y)-(x+y)]=4(2x-y)(x-2y)
推荐
猜你喜欢
© 2026 79432.Com All Rights Reserved.
电脑版|手机版