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Description:
  jungkook
Language: C/C++
Code:
program pt_bac1; 
var b,c :real;
begin          
writeln('hay nhap so b va c');read(b,c);
if b=0 then
        if c=0 then writeln('pt vo so nghiem')
              else writeln('pt vo nghiem')
       else writeln('pt co 1 nghiem',-c/b:4:2);
readln
end. 
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