#3

• Rational expression


  An equation that contains a rational expression
• Extraneous root


  A solution of an equation derived from the original equation, but not a solution of the original equation
• Quadratic function


  A second-degree function of the form f(x) = ax² + bx + c where a, b and c are real numbers and a # 0
• Quadratic functions


  • 2x²+x-5=0
  • 3x²-6=y
  • 5+ y² = x
  • 7x+2y=0
• LCM (Least Common Multiple)


  The smallest positive integer that is divisible by all the denominators in a rational algebraic equation