Quadratic Equation

  Quadratic Equation In  algebra , a  quadratic equation  (from  Latin   quadratus  ' square ') is any  equation  that can be rearranged in standard form as [1] where  x  represents an  unknown  value, and  a ,  b , and  c  represent known numbers, where  a  ≠ 0 . (If  a  = 0  and  b  ≠ 0  then the equation is  linear , not quadratic.) The numbers  a ,  b , and  c  are the  coefficients  of the equation and may be distinguished by respectively calling them, the  quadratic coefficient , the  linear coefficient  and the  constant coefficient  or  free term . [2] The values of  x  that satisfy the equation are called  solutions  of the equation, and  roots  or  zeros  of the  expression  on its left-hand side. A quadratic equation has at most two solutio...