jonibunny11
jonibunny11
09-08-2014
Mathematics
contestada
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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luana
luana
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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