> 数学 >
16(x-2y)^2-25(x+2y)^2
人气:137 ℃ 时间:2020-10-02 01:12:32
解答
16(x-2y)²-25(x+2y)²
=[4(x-2y)+5(x+2y)][4(x-2y)-5(x+2y)]
=(9x+2y)(-x-18y)
=-(9x+2y)(x+18y)
推荐
猜你喜欢
© 2026 79432.Com All Rights Reserved.
电脑版|手机版