Big Ideas Math - Algebra 1, A Common Core Curriculum

Published by Big Ideas Learning LLC
ISBN 10: 978-1-60840-838-2
ISBN 13: 978-1-60840-838-2

Chapter 9 - Solving Quadratic Equations - 9.1 - Properties of Radicals - Exercises - Page 486: 56

Answer

$\frac{5+\sqrt{3}}{11}$

Work Step by Step

The given expression is $=\frac{2}{5-\sqrt{3}}$ The conjugate of $5-\sqrt{3}$ is $5+\sqrt{3}$ $=\frac{2}{5-\sqrt{3}} \cdot \frac{5+\sqrt{3}}{5+\sqrt{3}}$ Use sum and difference pattern. $=\frac{2(5+\sqrt{3})}{5^2-(\sqrt{3})^2}$ Simplify. $=\frac{2(5+\sqrt{3})}{25-3}$ $=\frac{2(5+\sqrt{3})}{22}$ $=\frac{5+\sqrt{3}}{11}$
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