Answer
13
Work Step by Step
For solving I x+4 I = 9 we consider a positive and negative answer.
x+4 = 9
x=5
-(x+4) = 9
x=-13
The negative answer is -13 and thus the absolute value of -13 is 13.
I -13 I = 13
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 8 - Polynomials and Factoring - 8-6 Factoring ax(squared) + bx + c - Standardized Test Prep - Page 510: 54
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