Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 4 - Proportions, Percents, and Solving Inequalities - Chapters 1-4 Cumulative Review Problem Set: 17

Answer

-0.28

Work Step by Step

2$a^{2}$ - 4$b^{2}$ = We substitute a = 0.2 and b = -0.3 into the expression and simplify: 2 $\times$$(0.2)^{2}$ - 4 $\times$ $(-0.3)^{2}$ = 2 $\times$ 0.04 - 4 $\times$ 0.09 = 0.08 - 0.36 = -0.28
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