Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 11 - Cumulative Review - Page 836: 39

Answer

$m_{1} = 2+\sqrt{2}$ and $m_{2} = 2-\sqrt{2}$

Work Step by Step

Given $\dfrac{1}{4}m^2-m+\dfrac{1}{2} = 0$ $a = \dfrac{1}{4},\ b=-1,\ c =\dfrac{1}{2} $ Using the quadratic formula $\dfrac{-b\pm\sqrt{b^2-4ab}}{2a} , $ we have: $\dfrac{-(-1)\pm \sqrt{(-1)^2-4\times \dfrac{1}{4}\times \dfrac{1}{2}}}{\dfrac{1}{4}\times 2} = \dfrac{1\pm \sqrt{1-\dfrac{1}{2}}}{\dfrac{1}{2}} = \dfrac{1\pm \sqrt{\dfrac{1}{2}}}{\dfrac{1}{2}} = 2\pm2\sqrt{\dfrac{1}{2}} = 2\pm2\dfrac{1}{\sqrt{2}} = 2\pm\sqrt{2}$ Therefore the solutions are $m_{1} = 2+\sqrt{2}$ and $m_{2} = 2-\sqrt{2}$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.