计算:[(x-2y)^+(x-2y)(x+2y)-2x(2x-y)]÷2x

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计算:[(x-2y)^+(x-2y)(x+2y)-2x(2x-y)]÷2x
计算:[(x-2y)^+(x-2y)(x+2y)-2x(2x-y)]÷2x

计算:[(x-2y)^+(x-2y)(x+2y)-2x(2x-y)]÷2x
[(x-2y)^+(x-2y)(x+2y)-2x(2x-y)]
=[x^-4xy+4y^+x^2-4y^-4x^+2xy]
=(-2x^-2xy)
原式=(-2x^-2xy)/2x=-x-y

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