Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 2 - Review Exercises - Page 429: 21

Answer

$-7,7$, minimum product $-49$

Work Step by Step

Step 1. Assume the lower number is $x$; then the other number is $x+14$. Step 2. Their product is given by $f(x)=x(x+14)=x^2+14x=x^2+14x+49-49=(x+7)^2-49$ Step 3. Thus, the numbers are $-7,7$ and the minimum product is $-49$.
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