chiaDoi.m

%By FamiHug@FAMILUG
function [root1, root2] = chiadoi(f, saiso,cana,canb)

if subs(f,cana) * subs(f,canb) > 0

    disp('Khong co nghiem trong khoang a, b')

elseif subs(f,cana) * subs(f,canb) == 0

     disp('Mot trong 2 lai nghiem')

 else

      tb = mean(cana, canb);

      if subs(f,cana) * subs(f,tb) < 0

           if abs(tb - cana) < saiso

           else

               canb = tb;

           end



      elseif subs(f,cana) * subs(f,tb) > 0

          if abs(tb - canb) < saiso

          else

              cana = tb;

          end



      else

          disp('mot trong 2 la nghiem')

      end





  end

  disp('ket qua')

  disp(cana)



end





function value = mean(a,b)

    value = (a+b)/2;