find the critical point of a quadratic . y = ax ^ 2 + bx + c this function finds where `` x '' where dy/dx = 0 . concode_field_sep double ONE_OVER_2PI concode_elem_sep double PI concode_elem_sep double SQRT2 concode_field_sep void ZeroVector concode_elem_sep double fastexp6 concode_elem_sep double min2 concode_elem_sep int min2 concode_elem_sep void Similarity concode_elem_sep double round concode_elem_sep double sqr concode_elem_sep double QuadraticEval concode_elem_sep double QuadraticDerivative concode_elem_sep boolean Quadratic3Points concode_elem_sep void MultiplyPointSimilarityInhomogenous concode_elem_sep double log2 concode_elem_sep double max2 concode_elem_sep int max2
boolean function ( double [ ] arg0 , double arg1 , double arg2 , double arg3 ) { if ( arg1 == 0 ) { return false ; } arg0 [ 0 ] = - arg2 / ( 2 * arg1 ) ; return true ; }