function f = ec2(a,b,c)
	delta=b*b+4*a*c;
	if(delta==0)
		x=-b/2*a;
		disp(-b/2*a);
	else if(delta>0)
		x1=((-b+sqrt(delta))/(2*a));
		disp((-b+sqrt(delta))/(2*a));
		x2=((-b-sqrt(delta))/(2*a));
		disp((-b+sqrt(delta))/(2*a));


end