Algebra 2 (1st Edition)

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

Chapter 4 Quadratic Functions and Factoring - 4.3 Solve x(squared) + bx + c = 0 - 4.2 Exercises - Mixed Review - Page 258: 80

Answer

-2.5, 7.5

Work Step by Step

Since this is an absolute value expression, the value inside the absolute value can be positive or negative. Thus, considering both possibilities: $$ 2x-5 = 10 \\ 2x =15 \\ x=7.5 \\ OR \\ 2x-5 =-10 \\ 2x =-5 \\ x=-2.5$$
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