Answer
$(x+5)(x+12)$
Work Step by Step
Using factoring by grouping, the factored form of the given expression, $
x^2+5x+12x+60
,$ is
\begin{array}{l}\require{cancel}
(x^2+5x)+(12x+60)
\\\\=
x(x+5)+12(x+5)
\\\\=
(x+5)(x+12)
.\end{array}
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