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: 15

Answer

$x=25$ or $x=-20$

Work Step by Step

We solve by factoring: $x^{2}=5(x+100)$ $x^{2}=5x+500$ $x^{2}-5x-500=0$ $(x-25)(x+20)=0$ $x-25=0$ or $x+20=0$ So we have: $x=25$ or $x=-20$
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