## Algebra 2 Common Core

Published by Prentice Hall

# Chapter 4 - Quadratic Functions and Equations - 4-4 Factoring Quadratic Expressions - Practice and Problem-Solving Exercises: 56

#### Answer

$(x+2)(x-2)$

#### Work Step by Step

We can use the rule $(a+b)(a-b)=a^2-b^2$ because both terms, $x^2$ and 4 are perfect squares. $x^2-2^2=(x+2)(x-2)$

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