## Calculus with Applications (10th Edition)

$6x(-2x^{3}+5x+6)=-12x^{4}+30x^{2}+36x$
$6x(-2x^{3}+5x+6)$ Multiply $6x$ by each term inside the parentheses: $6x(-2x^{3}+5x+6)=-12x^{4}+30x^{2}+36x$