Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter P - Section P.7 - Equations - Exercise Set: 66

Answer

$\left\{-4-\sqrt7, -4+\sqrt7\right\}$

Work Step by Step

Divide 3 on both sides of the equation to obtain: $(x+4)^2=7$ Take the square root of both sides to obtain: $x+4 = \pm \sqrt{7}$ Add $-4$ on both sides of the equation to obtain: $x=-4 \pm \sqrt{7}$ Thus, the solution set of the given equation is $\left\{-4-\sqrt7, -4+\sqrt7\right\}$.
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