4x^2-(4x^2-4xy+y^2)(因式分解)
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4x^2-(4x^2-4xy+y^2)(因式分解)
4x^2-(4x^2-4xy+y^2)(因式分解)
4x^2-(4x^2-4xy+y^2)(因式分解)
4x^2-(4x^2-4xy+y^2)
=4x^2-(2x-y)^2
=(2x-2x+y)(2x+2x-y)
=y(4X-y)
或者:
4x^2-(4x^2-4xy+y^2)
=4x^2-4x^2+4xy-y^2
=4xy-y^2
=y(4x-y)
原式=4x²-4x²+4xy-y²
=4xy-y²
=y(4x-y)
等于4xˆ2-(2x-y)
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