Answer
$33x^2+25x+2$
Work Step by Step
The given expression, $
(3x+2)(7x+4x+1)
,$ is equivalent to
\begin{array}{l}\require{cancel}
(3x+2)(11x+1)
.\end{array}
Using $(a+b)(c+d)=ac+ad+bc+bd$ or the product of 2 binomials, the expression above is equivalent to
\begin{array}{l}\require{cancel}
3x(11x)+3x(1)+2(11x)+2(1)
\\\\=
33x^2+3x+22x+2
\\\\=
33x^2+25x+2
.\end{array}
