已知2X-Y=0,求X^2-2XY+Y^2分之2X+Y乘以(X-Y)的值.

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/17 17:26:36
已知2X-Y=0,求X^2-2XY+Y^2分之2X+Y乘以(X-Y)的值.已知2X-Y=0,求X^2-2XY+Y^2分之2X+Y乘以(X-Y)的值.已知2X-Y=0,求X^2-2XY+Y^2分之2X+

已知2X-Y=0,求X^2-2XY+Y^2分之2X+Y乘以(X-Y)的值.
已知2X-Y=0,求X^2-2XY+Y^2分之2X+Y乘以(X-Y)的值.

已知2X-Y=0,求X^2-2XY+Y^2分之2X+Y乘以(X-Y)的值.
2X-Y=0,2x=y
(2X+Y)/(X^2-2XY+Y^2)×(X-Y)
=4x/(x^2-4x^2+4x^2)×(-x)
=-4