# Chapter 9 Equations and Inequalities

## 9.1 Solving Quadratic Equations 1

A quadratic function is a function of the form f(x) = ã€–axã€—^2 + bx + c, where a, b and c are real numbers with a â‰ 0. A quadratic function is a function of the form f(x) = ã€–axã€—^2 + bx + c, where a, b and c are real numbers with a â‰ 0. In this section, you learn about Solving Quadratic Equations, quadratic equations, Solving Quadratic Equations by Factorising, solve quadratic equations.

Chapter 9 Equations and Inequalities

## 9.4 Solving Simple Simultaneous Equations

Simultaneous equations are two or more algebraic equations that share common variables and are solved at the same time. In this section, you learn about Solving Simple Simultaneous Equations, simultaneous equations, How to solve simultaneous equations by using the substitution method, substitution method, Solving problems simultaneously.

Chapter 9 Equations and Inequalities

## 9.6 Solve Linear and Quadratic Simultaneous Equations

Simultaneous equations are two or more algebraic equations that share common variables and are solved at the same time. When solving simultaneous equations with a linear and quadratic equation, there will usually be two pairs of solutions. In this section, you learn about Solve Linear and Quadratic Simultaneous Equations, one linear and one quadratic equations.

Chapter 9 Equations and Inequalities

## 9.7 Solve Linear Inequalities

Linear inequalities are the expressions where any two values are compared by the inequality symbols such as, â€˜<â€™, â€˜>â€™, â€˜â‰¤â€™ or â€˜â‰¥â€™. In this section you learn about Solve Linear Inequalities, basic inequality, brackets inequality, inequality solve, inequality.

Chapter 9 Equations and Inequalities