[(x+2y)^2-(-x-2y)(-x+2y)+2y(x-2y)]/2y计算-2a^2b-a^3-ab^2分解因式
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[(x+2y)^2-(-x-2y)(-x+2y)+2y(x-2y)]/2y计算-2a^2b-a^3-ab^2分解因式
[(x+2y)^2-(-x-2y)(-x+2y)+2y(x-2y)]/2y计算
-2a^2b-a^3-ab^2分解因式
[(x+2y)^2-(-x-2y)(-x+2y)+2y(x-2y)]/2y计算-2a^2b-a^3-ab^2分解因式
[(x+2y)²-(-x-2y)(-x+2y)+2y(x-2y)]/2y
=[(x+2y)²-(x+2y)(x-2y)+2y(x-2y)]/2y
=[(x²+4xy+4y²)-(x²-4y²)+(2xy-4y²)]/2y
=(x²+4xy+4y²-x²+4y²+2xy-4y²)/2y
=(6xy+4y²)/2y
=[2y(3x+4y)]/2y
=3x+4y
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
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【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y)
x^2(x-y)+(y-x)
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(x-y)(x-y)2(y-x) (x+2y-?)(x-2y+?)