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 - 4.5 Solving Equations by Factoring - 4.5 Exercises - Page 359: 28

Answer

$\color{blue}{\left\{0, 4.5\right\}}$

Work Step by Step

Factor out $x$ to obtain: $x(2x-9)=0$ RECALL: The Zero-Factor Property states that if $ab=0$, then $a=0$ or $b=0$, or both are zero. Use the Zero-Factor Property by equating each factor to zero to obtain: $x=0$ or $2x-9=0$ Solve each equation to obtain: $x=0$ or $2x-9=0 \\2x=0+9 \\2x=9 \\\frac{2x}{2}=\frac{9}{2} \\x=4.5$ Therefore, the solution set is $\color{blue}{\left\{0, 4.5\right\}}$.
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