Expanding brackets involves removing the brackets from an expression by multiplying out the brackets. This is achieved by multiplying every term inside the bracket by the term outside the bracket.
When multiplying out double brackets, every term in the first pair of brackets must be multiplied by each term in the second.
When expanding brackets, be very careful when dealing with negative numbers.
Example questions on expanding and simplifying expressions
Example 1 - Expanding a single pair of brackets
a) Expand: 3(x+6) .
a) Remember to multiply every term inside the brackets by the term outside: