Answer
$3x^2+8x-3$
Work Step by Step
Using $(a+b)(c+d)=ac+ad+bc+bd$ or the FOIL Method, the expression, $
(3x-1)(x+3)
$, is equivalent to
\begin{array}{l}
3x(x)+3x(3)-1(x)-1(3)
\\\\=
3x^2+9x-x-3
\\\\=
3x^2+8x-3
\end{array}
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 5 - Section 5.4 - Multiplying Polynomials - Exercise Set - Page 289: 61
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