code: function( p, q ) {
      var wurzel = Math.sqrt((p * p / 4) - q);
      var vorwurzel = (-p / 2);
      var result = [];
      if( wurzel > 0 ) {
        result = [vorwurzel + wurzel, vorwurzel - wurzel];
      }
      else if( wurzel === 0 ) {
        result = [vorwurzel];
      }
      return result;
    }
docs: Solves the quadratic equation for p and q.
  @method quadEquation
  @param p {Number} The parameter p.
  @param q {Number} The parameter q.
  @return {Array} The result with zero, one or two solutions.
  @for motionpredict