The basic language
The basic language
An equation says two expressions are equal, so you usually look for exact value or values that make both sides match. An inequality compares size using <<<, >>>, ≤\le≤, or ≥\ge≥, so the answer is often a range of values.
Step-by-step lessons on Edexcel AS Level Maths Equations and Inequalities, covering 3.1 Linear Simultaneous Equations, 3.2 Quadratic Simultaneous Equations, 3.3 Simultaneous Equations on Graphs, 3.4 Linear Inequalities, 3.5 Quadratic Inequalities, and 3.6 Inequalities on Graphs. Each one builds up to exam-style questions. Build fluency in the core algebra, surds and trigonometry topics early, since they underpin the calculus, statistics and mechanics content that follows.