2.2.1

How to Factorise

Test yourself

Factorising Quadratics

A quadratic expression is of the form ax2 + bx + c where a, b and c are numbers. For example 2x2 + 3x - 1.

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Factorising

  • Factorising a quadratic expression means writing it as the product of two brackets.
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Difference of two squares

  • When a quadratic expression is the difference of two squares it can be easily factorised:
  • General case: a2 - b2 = (a + b)(a - b).

Jump to other topics

1Number

1.1Using Numbers

1.2Fractions, Decimals & Percentages

1.3Powers & Roots

1.4Accuracy

2Algebra

2.1Introduction to Algebra

2.2Manipulating Algebra

2.3Proofs & Functions

2.4Straight Line Graphs

2.5Common Graphs

2.6Transformations & Tangents

2.7Properties of Graphs

2.8Solving Equations

2.9Inequalities

2.10Sequences

3Ratio

4Geometry

4.1Introduction to Geometry

4.2Triangles & Quadrilaterals

4.3Transformations

4.4Circle Basics

4.5Circle Theorems

4.6Measurements & Units

4.7Calculating Area

4.8Triangle Formulae

4.93D Shapes

4.10Vectors

5Probability

6Statistics

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