[(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-
[(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
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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
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化简:[(x+y)(x-y)(x+y)^2-2y(x-2y)](-2y) 谢谢!
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