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Algebra - Expansion of brackets
- Do not use 'x' to say multiply.
Use brackets
- 3y(4-2y)
- 3y(4-2y)
- To expand the expression we
multiply every term inside the
bracket by the term outside the
bracket
- 3y(4-2y)=12y-6y^2
- When there is a negative term outside the bracket, the
signs of the multiplied terms change.
- -a(2a^2-3a+1) = -2a^3+3a^2-a
- -a(2a^2-3a+1) = -2a^3+3a^2-a
- 3y(4-2y)=12y-6y^2
- Sometimes we need to multiply out brackets and then
simplify
- We need to multiply out both brackets and collect together like terms
- We need to multiply out both brackets
and collect together like terms.
- To expand or multiply out this expression we multiply every term
in the second bracket by every term in the first bracket
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