Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 3 - 3.4 - Zeroes of Polynomial Functions - 3.4 Exercises - Page 284: 62


$f(x)=(x+7i)(x-7i)$ The zeros: $x=-7i$ $x=7i$

Work Step by Step

$f(x)=x^2+49$ $f(x)=x^2-(7i)^2$ $f(x)=(x+7i)(x-7i)$ The zeros: $0=(x+7i)(x-7i)$ $x+7i=0$ $x=-7i$ $x-7i=0$ $x=7i$
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