Answer
$1+\sqrt7$
Work Step by Step
Our equation is: $x^2-(6+2x)=0\\x^2-2x-6=0\\(x-1)^2-1-6=0\\(x-1)^2=7$
Because $x$ is positive: $x-1=\sqrt7\\x=1+\sqrt7$
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0321867327
ISBN 13:
978-0-32186-732-2
Chapter 6 - Algebra: Equations and Inequalities - 6.5 Quadratic Equations - Exercise Set 6.5 - Page 400: 81
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
