Var
a,b,c,d:double;
Begin
write('a = ');
read(a);
write('b = ');
read(b);
write('c = ');
read(c);
d:=sqrt(b*b-4*a*c);
if d > 0 then begin
writeln('x1 = ', (-b+d)/(2*a));
writeln('x2 = ', (-b-d)/(2*a));
end
else
if d = 0 then
writeln('x = ', -b/(2*a))
else
write('Решений нет');
End.