## Elementary Technical Mathematics

$2b(a+6)(a-4)$
$2a^2b+4ab-48b$ 2b is a common factor. $2b(a^2+2a-24)$ =$2b(\ \ \ \ \ \ \ \ \ )(\ \ \ \ \ \ \ \ \ )$ =$2b(a\ \ \ \ \ \ \ )(a\ \ \ \ \ \ \ )$ =$2b(a+\ \ )(a-\ \ )$ The factors of -24 must have unlike signs. =$2b(a+6)(a-4)$ 6 and -4 have a sum of 2 and a product of -24.