College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 1, Equations and Graphs - Section 1.4 - Solving Quadratic Equations - 1.4 Exercises: 17

Answer

$x=4\pm\sqrt{15}$

Work Step by Step

We complete the square: $x^{2}-8x+1=0$ $x^{2}-8x=-1$ $x^{2}-8x+16=-1+16$ $(x-4)^{2}=15$ $x-4=\pm\sqrt{15}$ $x=4\pm\sqrt{15}$
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