因式分解 4xy-y^2-4x^2

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因式分解4xy-y^2-4x^2因式分解4xy-y^2-4x^2因式分解4xy-y^2-4x^24xy-y^2-4x^2=-(4x^2-4xy+y^2)=-(2x-y)^2 4*(xy-y&

因式分解 4xy-y^2-4x^2
因式分解 4xy-y^2-4x^2

因式分解 4xy-y^2-4x^2
4xy-y^2-4x^2
=-(4x^2-4xy+y^2)
= -(2x-y)^2

 4*(xy-y²-x²)

望采纳O(∩_∩)O~

-(2x-y)2

几年级的?

4xy-y^2-4x^2=-(x-2y)^2