Maths Unit 2

An Expression = contains letters and numbers but no equals sign

An Equation = contains an equals sign, terms in one letter and has numbers

An Identity = Has an equals sign and works with all numbers

To expand a single bracket:

• Multiply each term inside the bracket by the term outside the bracket

To expand double brackets:

• Use FOIL

Linear Equations = Equations which have no power/indices 

Non-Linear Equations = Equations that have powers/indices

Multiplying Powers  = Add the indices

Dividing Powers = Subtract the indices

Powers in Brackets = Multiply the indices