Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 1 - Section 1.3 - Algebraic Expressions - 1.3 Exercises: 39


$ 9x^2 - 16$

Work Step by Step

$Multiply$ $the$ $algebraic$ $expressions$ $using$ $a$ $Special$ $Product$ $Formula$ $and$ $simplify:$ $(3x-4)(3x+4)$ Use the Sum and Difference of Same Terms Product Formula: $(A+B)(A-B) = A^2-B^2$ $(3x-4)(3x+4) = (3x)^2 - 4^2$ $= 9x^2 - 16$
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