求[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值,其中2x-y=8.
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求[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值,其中2x-y=8.求[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值
求[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值,其中2x-y=8.
求[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值,其中2x-y=8.
求[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值,其中2x-y=8.
[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值,其中2x-y=8.
=[x²+y²-x²+2xy-y²+2xy-2y²]÷4y
=[4xy-2y²]÷4y
=2y[2x-y]÷4y
=[2x-y]÷2
=8÷2
=4