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 - Exercise Set: 60

Answer

$\left\{0, 4\right\}$

Work Step by Step

Subtract $12x$ on both sides of the equation to obtain: $3x^2-12x=0$ Factor out $3x$ to obtain: $3x(x-4)=0$ Equate each factor to zero then solve each equation to obtain: $3x=0 \text{ or } x-4=0 \\x=\frac{0}{3} \text{ or } x-4=0 \\x=0 \text{ or } x=4$ Thus, the solution set of the given equation is $\left\{0, 4\right\}$.
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