College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 1, Equations and Graphs - Section 1.7 - Solving Inequalities - 1.7 Exercises: 3

Answer

(a) No (b) No

Work Step by Step

(a) No, $x$ does not have to be positive. For example, if we use $x=-3$: x(x+1)=(-3)(-3+1)=(-3)(-2)=6>0 (b) No, $x$ can be less than 5. For example, if we use $x=3$: x(x+1)=(3)(3+1)=3(4)=12>5
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