Expanding and Factorising
Substitution

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 HCF
• Factorising by sum and product {Part 1}
• Factorising by sum and product {Part 2}

Variables in an expression have unknown values. If the values of the variables in an expression are known, then the value for the expression can be found by replacing the variables in the expression with these values. This process is known as substitution.