Answer
$48+34y-5y^2$
Work Step by Step
Using $(a+b)(c+d)=ac+ad+bc+bd$ or the product of 2 binomials, the product of the given expression, $
(8-y)(6+5y)
,$ is
\begin{array}{l}\require{cancel}
8(6)+8(5y)-y(6)-y(5y)
\\\\=
48+40y-6y-5y^2
\\\\=
48+34y-5y^2
.\end{array}
