**Factorise algebraic expressions by identifying numerical factors (ACMNA191)**

**LO: To factorise algebraic expressions.**

**Know:**

- What an expression is
- The four basic operations of numeracy

**Understand:**

- That factorising algebraic expressions is the opposite of expanding algebraic expressions.

**Do:**

- I can factorise algebraic expressions.

**Essential Questions:**

- How can expressions be factorised?

*Factorising an Expression*

*Factorising an Expression*

### Factorising an expression is the opposite of expanding an expression.

To factorise an expression you have to find **common factors (what is similar between the two)**, between the terms and pull them out.

### When you expand the expression out, it’s called the **distributive law**.

### 3ab + 9b can be factorised into 3b (a + 3) because 3b is common to both terms and can be removed to simplify the expression.

**How to Factorise Expressions**

**How to Factorise Expressions**

**Factorising Expressions Videos**

**Factorising Expressions Videos**

**Student Generated Videos**

**Student Generated Videos**