Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 6 - Section 6.6 - Solving Quadratic Equations by Factoring - Exercise Set: 25

Answer

The solutions are 0 and -20.

Work Step by Step

$x^{2}$+20x=0 x(x+20)=0 x=0 or x+20=0 x=0 or x+20-20=0-20 x=0 or x=-20 The solutions are 0 and -20. Check Let x=0 $x^{2}$+20x=0 $0^{2}$ +20*0=0 0=0 Let x=-20 $x^{2}$+20x=0 $(-20)^{2}$ +20(-20)=0 400-400=0 0=0
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