Algebra: A Combined Approach (4th Edition)

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

Chapter 11 - Section 11.3 - Solving Equations by Using Quadratic Methods - Exercise Set - Page 787: 25

Answer

$t=-2/3, 4/3$

Work Step by Step

$1+\frac{2}{3t-2}=\frac{8}{(3t-2)^2}$ $(3t-2)^2*1+(3t-2)^2*\frac{2}{3t-2}=(3t-2)^2*\frac{8}{(3t-2)^2}$ $(3t-2)^2+(3t-2)*2=8$ $3t*3t+3t(-2)+(-2)3t+(-2)(-2)+6t-4=8$ $9t^2-6t-6t+4+6t-4=8$ $9t^2-6t=8$ $9t^2-6t-8=8-8$ $9t^2-6t-8=0$ $t=(-b±\sqrt {b^2-4ac})/2a$ $t=(-(-6)±\sqrt {(-6)^2-4*9*(-8)})/2*9$ $t=(6±\sqrt {36+288)})/18$ $t=(6±\sqrt {324})/18$ $t=(6±18)/18$ $t=(6±18)/18$ $t=(6+18)/18$ $t=24/18$ $t=4/3$ $t=(6±18)/18$ $t=(6-18)/18$ $t=-12/18$ $t=-2/3$
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