Equations and Inequalities
Overview
– Solving quadratic equations
– Completing the square
– Solving simultaneous equations
– Solving quadratic simultaneous equations
– Solving linear and quadratic inequalities
Example Key Words
Variable
A symbol that stands for an unknown quantity
Equation
A mathematics statement that uses an equals sign to show that two expressions are equal.
Inequality
A relationship between two expressions that are not equal, often written with the symbols >, >, <, and <
Quadratic
An expression or equation that includes an x²
Simultaneous Equations
A set of two or more equations that contain two or more unknown quantities
Completing the Square
A way of simplifying or solving a quadratic equation by adding an expression to both sides to make one part of the equation a perfect square.