化简【(x²+y²)-(x-y)²+2y(x-y)】÷4y
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化简【(x²+y²)-(x-y)²+2y(x-y)】÷4y
化简【(x²+y²)-(x-y)²+2y(x-y)】÷4y
化简【(x²+y²)-(x-y)²+2y(x-y)】÷4y
【(x²+y²)-(x-y)²+2y(x-y)】÷4y
=(x²+y²-x²+2xy-y²+2xy-2y²)÷4y
=(4xy-2y²)÷4y
=x-y/2
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【(x²+y²)-(x-y)²+2y(x-y)】÷4y
=【(x²+y²)-(x²-2xy+y²)+(2xy-2y²)】÷4y
=(x²+y²-x²+2xy-y²+2xy-2y²)÷4y
=(4xy-2y²)÷4y
=x-y/2
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