Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 4 Quadratic Functions and Factoring - 4.8 Use the Quadratic Formula and the Discriminant - 4.8 Exercises - Skill Practice - Page 296: 24



Work Step by Step

Solving the equation using the quadratic formula, we find: $$m_{1,\:2}=\frac{-2\pm \sqrt{2^2-4\cdot \:1\left(-99\right)}}{2\cdot \:1} \\ m=9,\:m=-11$$ Checking by factoring the expression, we find: $$m\left(m-9\right)+11\left(m-9\right) \\ \left(m-9\right)\left(m+11\right)$$
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