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 - Concept and Vocabulary Check - Page 105: 14


Fill the blank with $\pm\sqrt{d}$

Work Step by Step

When we write $\sqrt{d}$, we mean the primary, positive square root of d. $(\sqrt{d})^{2}=d$ by the property of roots, but, also, $(-\sqrt{d})=(-1)^{2}(\sqrt{d})^{2}=d$ So, $u$ can be $+\sqrt{d}$ or $-\sqrt{d}$, which we write $\pm\sqrt{d}$. The square root property: If $u^{2}=d$ then $u=\pm\sqrt{d}$ Fill the blank with $\pm\sqrt{d}$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After 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.