Expanding and Factorising
Rearranging Formulas

Expanding and Factorising

​Pre-Test

• Pre-Test

​Algebra skills {revision}

• Substitution
• Simplifying by collecting like terms

​​Algebra skills

• Rearranging formulas

​Expansion

• The distributive law
• FOIL expansion
• Special situations
• Further expansion

Factorisation

• Factorising by the Highest Common Factor (HCF)
• Factorising by sum and product {Part 1}
• Factorising by sum and product {Part 2}

A formula is an equation showing the relationship between two or more variables or unknowns. When the variable required is not the subject of the formula, we need to rearrange the equation.