PROGRAM KORNI;
uses crt;
var a,b,c,D:integer;
X1,X2 :real;
begin
Writeln ('Введите a,b и c');
read (a);
read (b);
read (c);
begin
D:= sqrt (b)-4*a*c;
If D<0 then writeln('Корней нет'); <br> end;
X1:=-b+SQRT(D)/(2*a);
X2:=-b-SQRT(D)/(2*a);
Writeln('D=', D);
Writeln('X1=',X1:4:2);
Writeln('X2=',X2:4:2);
end.