[(x+2y)(-2y)+(x-2y)²]÷(6x)
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[(x+2y)(-2y)+(x-2y)²]÷(6x)
[(x+2y)(-2y)+(x-2y)²]÷(6x)
[(x+2y)(-2y)+(x-2y)²]÷(6x)
=(-2xy-4y²+x²-4xy+4y²)÷(6x)
=(-6xy+x²)÷(6x)
=-y+x/6
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-y)^2-(x+2y)(x-2y)]/y
计算:y-x分之x+y+x-y分之y-y-x分之2x-y
因式分解x(x+y)(x-y)-x(x+y)^2
化简:[(x+y)(x-y)(x+y)^2-2y(x-2y)](-2y) 谢谢!
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