[(x-2y)²+（x+2y)(x-2y)-2x(2X-y)]/2X 求化简

来源：学生作业帮助网编辑：六六作业网时间：2024/12/22 16:21:36

[(x-2y)²+（x+2y)(x-2y)-2x(2X-y)]/2X求化简[(x-2y)²+（x+2y)(x-2y)-2x(2X-y)]/2X求化简[(x-2y)²+（x

[(x-2y)²+（x+2y)(x-2y)-2x(2X-y)]/2X 求化简
[(x-2y)²+（x+2y)(x-2y)-2x(2X-y)]/2X 求化简

[(x-2y)²+（x+2y)(x-2y)-2x(2X-y)]/2X 求化简
[(x-2y)²+（x+2y)(x-2y)-2x(2X-y)]/2X
=[(x-2y)(x-2y+x+2y)-2x(2X-y)]/2X
=[(x-2y)(2x)-2x(2X-y)]/2X
=[(x-2y-2x+y)(2x)]/2X
=-x-y
就是乘法分配律 ab+cb=（a+c）*b

展开即可原式=（-2x*2-2xy）/2X=-X-Y

[(x-2y)²+（x+2y)(x-2y)-2x(2X-y)]/2X
=[(x-2y)(x-2y+x+2y)-2x(2X-y)]/2X
=[2x(x-2y)-2x(2X-y)]/2X
=x-2y-(2x-y)
=-x-y