Quadratic Equations Program

Quadratic Equations Program;
uses wincrt;
var a,b,c,d,x1,x2 :real;
begin
clrscr;
writeln('Menghitung akar-akar persamaan kuadrat');
writeln('Nilai a,b,c dimasukkan dengan jeda spasi');
write('Insert a,b,c:');
readln(a,b,c);
d:=(b*b) - (4*a*c);
if d < 0 then writeln('tidak ada akar real')
else
begin
x1:=(-b + (sqrt(d)))/(2*a);
x2:=(-b - (sqrt(d)))/(2*a);
writeln('x1 =',x1:6:2);
writeln('x2 =',x2:6:2);
end;
readln;
end.