作业帮(x+2y)(x-2y)-3y(x-2y)到底哪个才是啊?
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(x+2y)(x-2y)-3y(x-2y)到底哪个才是啊?
(x+2y)(x-2y)-3y(x-2y)
到底哪个才是啊?
(x+2y)(x-2y)-3y(x-2y)到底哪个才是啊?
(x+2y)(x-2y)-3y(x-2y)
=(x-2y)(x+2y-3y)
=(x-2y)(x-y)
=x^2-4y^2-3xy+6y^2
=x^2-3xy+2y^2
(x-y)(x-2y)
z
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
x(x-y)2-(y-x)3
化简y(x+y)+(x+y)(x-y)-x^2
计算：x+2y/x-y+2x/y-x-3y/x-y
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
(x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2
[2/3x-2/x+y(x+y/3x-x-y)]/x-y/x
化简：{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x
计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x
【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y)
化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x
[(x-y)^2-(x+2y)(x-2y)]/y
2X(2X-3Y)-3Y(X+Y)
(-2x y)^2-(3y-x)(-x-3y)
（x+2y)^2-(x+y)(3x-y)
计算(x+y)(x+y)^2(-x-y)^3
化简:5(x-y)+2(x+y)-3(x-y)