College Algebra 7th Edition

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

Chapter P, Prerequisites - Section P.8 - Solving Basic Equations - P.8 Exercises: 4

Answer

None of the equations are linear. See below for explanations.

Work Step by Step

(a) $x(x+1)=6$ is the same as $x^{2}+x=6$. This is not linear because linear equations can't have powers of $x$ greater than 1. (b) $\sqrt{x+2}=x$, which is not linear because linear equations can't have powers of $x$ of 1/2. (c) $3x^{2}-2x-1=0$. This is not linear because linear equations can't have powers of $x$ greater than 1.
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