factor the polynomial

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x^3y^4 - 27y^4

Jan 24th, 2015

x^3y^4 - 27y^4
= y^4(x^3 -27) =y^4(x^3 -3^3)

since a^3 - b^3 =(a-b) (a^2+ab+b^2)

so, y^4(x^3 -3^3) = y^4(x-3)(x^2+3x+9)


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Jan 24th, 2015

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