Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 12 - Data Analysis and Probability - 12-6 Permutations and Combinations - Mixed Review - Page 756: 74


$x= .808, -6.808$

Work Step by Step

$2x^2+12x-11=0$ $x=(-b±\sqrt b^2-4ac)/2a$ $x=(-12±\sqrt 12^2-4*2*-11)/2*2$ $x=(-12±\sqrt 144+88)/4$ $x=(-12±\sqrt 232)/4$ $x=(-12±2\sqrt 58)/4$ $x=(-6±\sqrt 58)/2$ $x=(-6±7.616)/2$ $x=(-6+7.616)/2$ $x=(1.616)/2$ $x=.808$ $x=(-6-7.616)/2$ $x=(-13.616)/2$ $x=-6.808$
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