Answer
$(3x^3-2)(x^2+2)$
Work Step by Step
$3x^5+6x^3-2x^2-4=(3x^3)x^2+(3x^3)2+(-2)x^2+(-2)2=3x^3(x^2+2)-2(x^2+2)=(3x^3-2)(x^2+2)$
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