### Introduction

This Section describes how functions involving a constant numerator and a squared variable denominator can be used in adding sound energies of different sources.

#### Prerequisites

- be competent at algebraic manipulation
- be familiar with polynomial functions
- be able to use Pythagorasâ€™Â theorem
- be able to use the formula for solving quadratics

#### Learning Outcomes

- model inverse square problems
- use a graphical method to solve a quadratic equation