# Chapter 9 - Quadratic Functions and Equations - 9-3 Solving Quadratic Equations - Practice and Problem-Solving Exercises: 12

$9g^{2}-25$

#### Work Step by Step

Simplify each product. Write in standard form. $(3g-5)(3g+5)$ Use Foil $(3g\times3g)+(3g\times5)+(-5\times3g)+(-5\times5)$ Simplify: $9g^{2}+15g-15g-25$ simplify $9g^{2}-25$

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