把下列各式分解因式:-36x^2+12xy-y^2

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把下列各式分解因式:-36x^2+12xy-y^2
把下列各式分解因式:-36x^2+12xy-y^2

把下列各式分解因式:-36x^2+12xy-y^2
-36x^2+12xy-y^2
=-(36x^2-12xy+y^2)
=-(6x-y)^2

-36x^2+12xy-y^2=-(36x^2-12xy+y^2)
=-(6x-y)^2