Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 4 - Quadratic Functions - 4.6 Solving Quadratic Equations by Using the Quadratic Formula - 4.6 Exercises - Page 373: 32



Work Step by Step

Subtract $45$ from each side to obtain: \begin{align*} 4x+45-45&=5-45\\ 4x&=-40\end{align*} Divide both sides by $4$ to obtain: \begin{align*} \frac{4x}{4}&=\frac{-40}{4}\\\\ x&=-10\end{align*} Therefore, the solution is $\color{blue}{x=-10}$.
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