program kvadratna;
uses crt;
var
a,b,c:integer;
w:real;
//w=(-b-sqrt(sqr(b)-4ac))/2a
begin
clrscr();
writeln('izracunaj formulu');
writeln('w=(-b-sqrt(sqr(b)-4ac))/2a');
writeln('unesi promenjive');
write('a='); readln(a);
write('b='); readln(b);
write('c='); readln(c);
if (sqr(b)>4*a*c) then
begin
if (a<>0) then
begin
w:=(-b-sqrt(sqr(b)-4*a*c))/2*a;
writeln('w=(-b-sqrt(sqr(b)-4*a*c))/2*a=',w:10:4);
end
else
begin
writeln('a nesme biti 0');
end;
end
else
begin
writeln('4ac mora biti manje od sqr(b)');
end;
readln();
end.
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