数学(-4y²+10yx-4x²)÷(2x-y)
2个回答
(-4y²+10yx-4x²)÷(2x-y)
=-2(2x²-5xy+2y²)÷(2x-y)
=-2(2x-y)(x-2y)÷(2x-y)
=-2(x-2y)
=-2x+4y
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