Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 5 - Exponents and Polynomials - 5.3 - Multiplying Polynomials - Problem Set 5.3: 73

Answer

$-9x^2+9x+4$

Work Step by Step

Using $(a+b)(c+d)=ac+(ad+bc)+bd$, or the FOIL Method, the given expression, $ (-3x-1)(3x-4) ,$ is equivalent to \begin{array}{l}\require{cancel} -9x^2+(12x-3x)+4 \\\\= -9x^2+9x+4 .\end{array}
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