Equation and Inequality

Things to remember

• An equation can be written in the form ax + b = 0. It can also be represented in a graph.
• An inequality is a relationship between two quantities that are not equal.
• A linear equation in one variable has only one solution. 
• A general quadratic equation can be written in the form ax²+ bx + c = 0, where x represents a variable or an unknown and a, b and c are constants with a≠ 0.(If a = 0, the equation is the linear equation).