Answer
$y^{2}$(x-3)($x^{2}$+3x+9)
Work Step by Step
$x^{3}$$y^{2}$-27$y^{2}$=$y^{2}$($x^{3}$ -27)=
$y^{2}$($x^{3}$ -$3^{3}$)=$y^{2}$(x-3)($x^{2}$+x3+$3^{2}$)=
$y^{2}$(x-3)($x^{2}$+x3+$3^{2}$)=$y^{2}$(x-3)($x^{2}$+3x+9)
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