Answer
$y^2-10y-24$
Work Step by Step
Using $(a+b)(c+d)=ac+(ad+bc)+bd$, or the FOIL Method, the given expression, $
(y+2)(y-12)
,$ is equivalent to
\begin{array}{l}\require{cancel}
y^2+(-12y+2y)-24
\\\\=
y^2-10y-24
.\end{array}
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