Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 3 - 3.1 - Quadratic Functions and Models - 3.1 Exercises - Page 250: 78



Work Step by Step

The $y$ of the vertex is $-50$: $f(-\frac{b}{2a})=-50$ $f(-\frac{b}{2})=-50$ $(-\frac{b}{2})^2+b(-\frac{b}{2})-25=-50$ $\frac{b^2}{4}-\frac{b^2}{2}=-25$ $-\frac{b^2}{4}=-25$ $b^2=100$ $b=±10$
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.