## Precalculus: Mathematics for Calculus, 7th Edition

$6x(2x^2+3)$
$Factor$ $the$ $expression$ $completely:$ $12x^3 + 18x$ The common factor for both terms is 6x. $6x(2x^2+3)$ We can check the answer by distributing the 6x to both terms. $6x(2x^2+3) = (6x\times2x^2) + (6x\times 3)$ $= 12x^3 + 18x$