Answer
$a^2-12a+11$
Work Step by Step
Make a table.
$\ \ \ \ \ \ \ \ \underline{|\ \ \ \ \ \ \ a\ \ \ \ \ \ |\ \ \ \ \ \ -1\ \ \ \ \ |}$
$\ \ \ \ \ a\ |\ \ \ \ \ \ \ a^2\ \ \ \ |\ \ \ \ \ \ -a\ \ \ \ \ |$
$-11\ |\ \ -11a\ \ |\ \ \ \ \ \ \ \ \ 11\ \ \ \ \ |$
The product is
$a^2-a-11a+11$
Combine like terms.
$a^2-12a+11$
