## Introductory Algebra for College Students (7th Edition)

$6x$; $6x$
RECALL: A difference of two squares can be factored using the formula: $a^2-b^2=(a+b)(a-b)$ The given binomial can be written as: $=(6x)^2-7^2$ This binomial is a difference of two squares. Factor using the formula above with $a=6x$ and $b=7$ to obtain: $=(6x+7)(6x-7)$ Thus, the missing expression in the given statement are: $6x$; $6x$