Answer
$x^2-6x-7$
Work Step by Step
Using the Distributive Property and then combining similar terms, the given expression, $
(x-7)(x+1)
, $ is equivalent to
\begin{array}{l}\require{cancel}
x(x)+x(1)-7(x)-7(1)
\\\\=
x^2+x-7x-7
\\\\=
x^2-6x-7
.\end{array}