5x208 [by expanding brackets]
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Algebraic expressions
Letters can be used to stand for unknown values or values that can change. Formulas can be written and equations solved in a range of problems in science and engineering.
Part of
Maths
Algebra
Expanding brackets
To expand a bracket means to multiply each term in the bracket by the expression outside the bracket. For example, in the expression , multiply both  and 7 by 3, so:
.
Expanding brackets with powers
Powers or indices show how many times a number has been multiplied by itself. For example,  and .
Using index laws, terms that contain powers can be simplified. Remember to use index laws when multiplying expressions that contain powers. For example:
Letters can be used to stand for unknown values or values that can change. Formulas can be written and equations solved in a range of problems in science and engineering.
Part of
Maths
Algebra
Expanding brackets
To expand a bracket means to multiply each term in the bracket by the expression outside the bracket. For example, in the expression , multiply both  and 7 by 3, so:
.
Expanding brackets with powers
Powers or indices show how many times a number has been multiplied by itself. For example,  and .
Using index laws, terms that contain powers can be simplified. Remember to use index laws when multiplying expressions that contain powers. For example:
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