code: public void process() {
  		solver.solve(Y,X);
  
  		double a = X.data[0];
  		double b = X.data[1];
  		double c = X.data[2];
  		double d = X.data[3];
  		double e = X.data[4];
  
  		double bottom = 4*a*c - b*b;
  		deltaX = (b*e - 2*d*c)/bottom;
  		deltaY = (b*d - 2*a*e)/bottom;
  	}
docs: Computes the maximum.