Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 7 - Section 7.1 - Percents, Decimals, and Fractions - Exercise Set: 90

Answer

-$\frac{21}{121}$

Work Step by Step

($\frac{2}{11}$ + $\frac{5}{11}$ )$\times$($\frac{2}{11}$ - $\frac{5}{11}$ )= =($\frac{2+5}{11}$ )$\times$ ($\frac{2-5}{11}$) = =$\frac{7}{11}$ $\times$$\frac{-3}{11}$ = =$\frac{7\times(-3)}{11\times11}$ = -$\frac{21}{121}$
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