Answer
$2\sqrt{5}$
Work Step by Step
Factor out $\sqrt{5}$.
$6\sqrt{5}-4\sqrt{5}=\sqrt{5}(6-4)$
Simplify.
$=\sqrt{5}(2)$
$=2\sqrt{5}$
Hence, the correct answer is $2\sqrt{5}$.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Appendix A - Review - A.10 nth Roots; Rational Exponents - A.10 Assess Your Understanding - Page A88: 34
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