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Expanding brackets
- To expand brackets, you need to multiply the number
outside the bracket by ALL the values inside the bracket
- For example: 3y(4-2y) is the same as (3y)*(4-2y). However, we don't use '*'
in algebra. So it is written as 3y(4-2y).
- To expand or multiply out of this bracket, we multiply
every term inside the bracket by the term outside the
bracket.
- To expand or multiply out of this bracket, we multiply
every term inside the bracket by the term outside the
bracket.
- A slightly harder example of expanding brackets is
working with negatives.
- For example, try solving this:
- When there is a negative term outside the bracket, the
signs of the multiplied terms change
- When there is a negative term outside the bracket, the
signs of the multiplied terms change
- In general:
- For example, try solving this:
- Sometimes we need to multiply out
brackets and then simplify expressions
- Try this:
- For example: 3y(4-2y) is the same as (3y)*(4-2y). However, we don't use '*'
in algebra. So it is written as 3y(4-2y).
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