Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 5 Polynomials and Polynomial Functions - 5.2 Evaluate and Graph Polynomial Functions - 5.2 Exercises - Mixed Review - Page 344: 64


$x=8$ or $x=6$

Work Step by Step

Given: $y=x^2-14x+48$ The function is in quadratic form: $y=ax^2+bx+c$ with $a=1, b=-14, c=48$ Find x by using: $x=\frac{-b \pm \sqrt b^2-4ac}{2a}=\frac{-(-14)\pm\sqrt (-14)^2-4.1.48}{2.1}=\frac{14\pm2}{2}$ $x=\frac{14+2}{2}$ or $x=\frac{14-2}{2}$ $x=8$ or $x=6$
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