Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 6 - Section 6.6 - Solving Quadratic Equations by Factoring - Exercise Set - Page 473: 15


x=-8 or -1

Work Step by Step

Rewrite the equation in standard form. x$^2$+9x=-8 x$^2$+9x+8=0 Factor the trinomial. (x+8)(x+1)=0 Set each variable factor as equal to zero and then isolate the variable to find the solutions. x+8=0 or x+1=0 x=-8 or x=-1 Enter the original equation into your graphing utility to observe that the graph crosses the x-axis at -8 and -1.
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