jonibunny11 jonibunny11

09-08-2014
Mathematics

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Factor 9x^3y-25xy^3 completely.

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Аноним Аноним

09-08-2014

[tex]9x^3y-25xy^3=xy(9x^2-25y^2)=xy\underbrace{\left[(3x)^2-(5y)^2\right]}_{use\ a^2-b^2=(a-b)(a+b)}\\\\=\boxed{xy(3x-5y)(3x+5y)}[/tex]

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09-08-2014

[tex]9x^3y-25xy^3=\\\\xy(9x^2-25y^2)=\ \ \ |from\ ( a^2-b^2)=(a-b)(a+b)\\\\xy(3x-5y)(3x+5y)[/tex]

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