# Chapter 8 - Polynomials and Factoring - 8-4 Multiplying Soecial Cases - Lesson Check - Page 507: 3

4$r^{2}$-9

#### Work Step by Step

Given: (2r-3)(2r+3) FOIL method: 4$r^{2}$+6r-6r-9 Combine like terms: 4$r^{2}$-9

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