Algebra 2 Common Core

Published by Prentice Hall
ISBN 10: 0133186024
ISBN 13: 978-0-13318-602-4

Chapter 6 - Radical Functions and Rational Exponents - 6-3 Binomial Radical Expressions - Got It? - Page 376: 3

Answer

$6 \sqrt[3] {2}$

Work Step by Step

Factor the radicand so that we can take the cube roots later: $\sqrt[3]{125(2)} + \sqrt[3] {27(2)} - \sqrt[3] {8(2)}$ $=\sqrt[3] {5^3 \cdot 2} + \sqrt[3] {3^3 \cdot 2} - \sqrt[3] {2^3 \cdot 2}$ Take the cube roots: $=5\sqrt[3] {2} + 3 \sqrt[3] {2} - 2 \sqrt[3] {2}$ Since all terms have the same radical, add or subtract the coefficients from left to right, keeping the radical as-is: $=(5+3-2)\sqrt[3]{2}\\ =6 \sqrt[3] {2}$
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