Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 9 - Cumulative Review Exercises - Page 686: 30

Answer

$$(x - 2)(x^2 + 2x + 4)$$

Work Step by Step

Looking at this expression, we can see that both terms are cubes, so we can factor this expression using the formula for the difference of cubes, which is given by: $$(a - b)(a^2 + ab + b^2)$$ where $a$ is the cubed root of the first term and $b$ is the cubed root of the second term. In this case, $a$ is the $\sqrt[3] x^3$, which is $x$, and $b$ is the $\sqrt[3] 8$, which is $2$. Let us plug in these values into the formula: $$(x - 2)(x^2 + (x)(2) + 2^2)$$ Let us simplify the exponents first: $$(x - 2)(x^2 + (x)(2) + 4)$$ Let us multiply to simplify: $$(x - 2)(x^2 + 2x + 4)$$
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