因式分解:9-x^2+12xy-36y^2

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因式分解:9-x^2+12xy-36y^2
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因式分解:9-x^2+12xy-36y^2
因式分解:9-x^2+12xy-36y^2

因式分解:9-x^2+12xy-36y^2
你好
原式=9-(x^2-12xy+36y^2)
=9-(x-6y)^2
=(3-x+6y)(3+x-6y)

9-x^2+12xy-36y^2
=9-[x²-12xy+36y²]
=9-(x-6y)²
=[3+x-6y](3-x+6y)

9-x^2+12xy-36y^2
=9-(x^2-12xy+36y^2)
=3^2-(x-6y)^2
=(3+x-6y)(3-x+6y)