Answer
$(b+2)(b+18)$
Work Step by Step
$b2+20b+36$ has no common monomial factor
=$(\ \ \ \ \ \ \ \ \ )(\ \ \ \ \ \ \ \ \ )$
=$(b\ \ \ \ \ \ \ )(b\ \ \ \ \ \ \ )$
=$(b+\ \ )(b+\ \ )$ All signs in the trinomial are positive.
=$(b+2)(b+18)$ 2 and 18 have a sum of 20 and a product of 36.
