Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 8 - Review - Page 532: 62

Answer

$x=\dfrac{17\pm \sqrt{145}}{9}$

Work Step by Step

Using the properties of equality, the given quadratic equation, $ (3x-4)^2=10x ,$ is equivalent to \begin{array}{l}\require{cancel} (3x)^2+2(3x)(-4)+(-4)^2=10x \\\\ 9x^2-24x+16=10x \\\\ 9x^2+(-24x-10x)+16=0 \\\\ 9x^2-34x+16=0 .\end{array} Using $x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}$ or the Quadratic Formula, the solutions of the quadratic equation above are \begin{array}{l}\require{cancel} x=\dfrac{-(-34)\pm\sqrt{(-34)^2-4(9)(16)}}{2(9)} \\\\ x=\dfrac{34\pm\sqrt{1156-576}}{18} \\\\ x=\dfrac{34\pm\sqrt{580}}{18} \\\\ x=\dfrac{34\pm\sqrt{4\cdot145}}{18} \\\\ x=\dfrac{34\pm\sqrt{(2)^2\cdot145}}{18} \\\\ x=\dfrac{34\pm2\sqrt{145}}{18} \\\\ x=\dfrac{2(17\pm \sqrt{145})}{18} \\\\ x=\dfrac{\cancel{2}(17\pm \sqrt{145})}{\cancel{2}(9)} \\\\ x=\dfrac{17\pm \sqrt{145}}{9} .\end{array}
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.