2.1.1

Algebra Basics

Test yourself

Algebra Rules

Here are some common rules of algebra:

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Common rules

  • ab means a × b
  • abc means a × b × c
  • 5a means 5 × a or a + a + a + a + a
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Coefficients

  • A number written before an algebraic symbol is called a coefficient.
    • In the expression 3x - 4y + z, x has a coefficient of 3, y has a coefficient of -4 and z has a coefficient of 1.
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Brackets

  • We can expand brackets like this.
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Common rules

  • a² means a × a
  • a4 means a × a × a × a
  • ab²c means a × b × b × c
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Common rules

  • 12a means 0.5 × a
  • 1a means 1 × a but is just written as a

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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