%problem 2 erfan bayat 91109843
%hal az ravash 2 bakhshi
a = 0;%initial amount
b = 2;%initial amount
x = 2;
while abs(x^5 - x - 1) >10^-10
x = ((a + b)/2);
y = x^5 - x - 1;
if(y > 0)
b = x;
end
if(y < 0)
a = x;
end
end
vpa(x,11)