Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 8 - Polynomials and Factoring - 8-2 Multiplying and Factoring - Practice and Problem-Solving Exercises - Page 496: 48



Work Step by Step

$ 9x^{3}-15x\qquad$...find the GCF. $9x^{3}=(3)\cdot 3\cdot(x)\cdot x\cdot x$ $-15x=-1\cdot(3)\cdot 5\cdot(x)$ GCF=$3x$ $9x^{3}-15x\qquad...$factor out the GCF $=3x(3x^{2})-3x(5)\qquad...$apply the Distributive Property. $=3x(3x^{2}-5)$ Comparing $3x $ with $ax$, we see that $a=3$.
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