Algebra

• Variable


  A letter or symbol that represents any member of a collection of two or more numbers
• Constant


  A letter or a symbol that represents a specific number
• Literals or literal numbers


  Letters used to represent numbers
• Multiplication Property


  X × Y = XY
• Multiplication Property


  • 5 × X = 5X
  • a × a × a ×….× 11 times = a11 times
• Exponent


  In x9, 9 is called the index or exponent, and x is called the base
• Operations used in algebra

  • Addition
  • Subtraction
  • Multiplication
  • Division
• Addition


  x + y
• Subtraction


  x - y
• Multiplication


  xy or x.y or x(y) or (x)(y)
• Order of operations in algebra

  1. Perform all the operations inside the brackets

  2. Perform the operations on roots and exponents

  3. Perform all the division and multiplication operations moving from left to right

  4. Perform all the addition and subtraction operations from left to right