Algebraic Notation : Theory

• • An expression is made up of one or more terms (e.g. 4x + 5)
  • An equation uses = to show that two expressions have the same value
• • An inequality use < , > , ≥  or  ≤  to show how the value of one expression compares with the value of another expression 
  • An identity use ≡ to show that expression have the same value for all values of the variables