Answer
$x^{3}+x^{2}-18x+18$
Work Step by Step
$(x-3)(x^{2}+4x-6)=$
$x(x^{2}+4x-6)-3(x^{2}+4x-6)=$
$x^{3}+4x^{2}-6x-3x^{2}-12x+18=$
$x^{3}+4x^{2}-3x^{2}-6x-12x+18=$
$x^{3}+x^{2}-18x+18$
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