Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 10 - Exponents and Radicals - 10.8 The Complex Numbers - 10.8 Exercise Set - Page 686: 67



Work Step by Step

Multiplying by the conjugate of the denominator, the given expression, $ \dfrac{2}{3-2i} ,$ is equivalent to \begin{array}{l}\require{cancel} \dfrac{2}{3-2i}\cdot\dfrac{3+2i}{3+2i} \\\\= \dfrac{2(3)+2(2i)}{(3)^2-(2i)^2} \\\\= \dfrac{6+4i}{9-4i^2} \\\\= \dfrac{6+4i}{9-4(-1)} \\\\= \dfrac{6+4i}{9+4} \\\\= \dfrac{6+4i}{13} .\end{array}
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