Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Appendix A - Review - A.3 Polynomials - A.3 Assess Your Understanding - Page A31: 73

Answer

$9x^2-16$

Work Step by Step

Recall the difference of two squares formula: $(a-b)(a+b)=a^2-b^2$ By applying this formula, we get: $$ (3x + 4)(3x - 4)=(3x)^2-4^2=9x^2-16 .$$
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