IGCSE Edexcel Higher Maths · Topic 4 of 12
Choose a subtopic. IGCSE Mathematics A Topic 2: Equations, Formulae and Identities. 27 lessons in 5 subtopics.
Revise Topic 2: Equations, Formulae and Identities for IGCSE Edexcel Higher Maths, including Use of Symbols and Algebraic Manipulation.
27
Lessons
5
Subtopics
Topic 2: Equations, Formulae and Identities has 5 subtopics:
27 lessons, grouped by subtopic.
Go back to the full IGCSE Edexcel Higher Maths topic list, or practise this topic with past-paper questions.
IGCSE Mathematics A Topic 2: Equations, Formulae and Identities. 27 lessons in 5 subtopics.
The quadratic formula, x = (-b ± √(b² - 4ac)) ÷ 2a, solves any quadratic in the form ax² + bx + c = 0. The Completing the Square and the Quadratic Formula notes cover this in full.
The area of a trapezium is A = 1/2(a + b)h, where a and b are the parallel sides and h is the perpendicular height. The Substituting into and Interpreting Formulae notes cover this in full.
To expand and simplify, expand each bracket, write out all the terms, then collect like terms. The Collecting Like Terms and Basic Algebraic Operations notes cover this in full.
An expression is a mathematical phrase made up of one or more terms connected by operations such as +, -, × and ÷. The Understanding Algebraic Language notes cover this in full.
The symbol ∝ means is proportional to, so y ∝ x means y = kx, where k is a non-zero constant. The Solving Direct and Inverse Proportion Problems notes cover this in full.
To expand three brackets, expand two first, then multiply the result by the third. The Expanding and Factorising Expressions notes cover this in full.
An inequality compares two expressions using a symbol such as ≤, ≥, greater than or less than, so its solution is a set of values rather than a single number. The Understanding Algebraic Language notes cover this in full.
A set is a collection of objects or values grouped together. The Set Language, Subsets and Venn Diagrams notes cover this in full.