## Algebra 2 (1st Edition)

Published by McDougal Littell

# Chapter 10 Counting Methods and Probability - 10.1 Apply the counting Principles and Permutations - 10.1 Exercises - Mixed Review - Page 689: 73

#### Answer

$$\left(4x\right)^2-5^2$$

#### Work Step by Step

Multiplying the equation out, we find: $$\left(4x\right)^2-5^2\\ \left(4x\right)^2-5^2 \\ 16x^2 -25$$

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