Answer
$3x^{2}+13x+4.$
Work Step by Step
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 $3x^{2}+13x+4.$
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 8 - Polynomials and Factoring - 8-3 Multiplying Binomials - Got It? - Page 499: 2
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