Answer
$-2, 6$
Work Step by Step
Take logarithm on both sides to get $(2x)ln5^2=(x^2-12)ln5 \longrightarrow x^2-12-4x=0 \longrightarrow (x+2)(x-6)=0 \longrightarrow x=-2, 6$
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 5 - Exponential and Logarithmic Functions - Chapter Review - Review Exercises - Page 346: 38
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