Answer
$\frac{3m(2-\sqrt {m+n})}{4-m-n}$
Work Step by Step
Multiply $\frac{2-\sqrt {m+n}}{2-\sqrt {m+n}}$ to the expression, we have:
$\frac{3m}{2+\sqrt {m+n}}\cdot \frac{2-\sqrt {m+n}}{2-\sqrt {m+n}}=\frac{3m(2-\sqrt {m+n})}{4-m-n}$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter R - Review of Basic Concepts - R.7 Radical Expressions - R.7 Exercises - Page 76: 107
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