## Algebra 1: Common Core (15th Edition)

$3x^{2}+13x+4.$
Make a table of products. $\begin{array}{rll} & x & 4\\ \hline3x| & 3x^{2} & 12x\\ 1 |& x & 4 \end{array}$ The product is $3x^{2}+12x+x+4$, or $3x^{2}+13x+4.$