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 788: 34

Answer

$x=5/8, 2$

Work Step by Step

$2*(4m-3)^2-9(4m-3)=5$ $2*(4m*4m+4m*(-3)+4m*(-3)+(-3)(-3))-36m+27=5$ $2*(16m^2-12m-12m+9)-36m+22=0$ $2*(16m^2-24m+9)-36m+22=0$ $32m^2-48m+18-36m+22=0$ $32m^2-84m+40=0$ $(32m^2-84m+40=0)/4$ $8m^2-21m+10=0$ $x=(-b±\sqrt {b^2-4ac})/2a$ $x=(-(-21)±\sqrt {(-21)^2-4*8*10})/2*8$ $x=(21±\sqrt {441-320})/16$ $x=(21±\sqrt {121})/16$ $x=(21±11)/16$ $x=(21±11)/16$ $x=(21+11)/16$ $x=32/16$ $x=2$ $x=(21±11)/16$ $x=(21-11)/16$ $x=10/16$ $x=5/8$
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