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

$(7+x)(x+y)$
$7x+7y+x^{2}+xy\qquad$...group terms with common factors. $=(7x+x^{2})+(7y+xy)\qquad$...factor from each group. $=x(7+x)+y(7+x)\qquad$...factor out the common binomial factor,$7+x$. $=(7+x)(x+y)$