Question 82
Find all real numbers $x$ satisfying
$$
x^{9} + \frac{9}{8} x^{6} + \frac{27}{64} x^{3} - x + \frac{219}{512} = 0
$$
$$
x^{9} + \frac{9}{8} x^{6} + \frac{27}{64} x^{3} - x + \frac{219}{512} = 0
$$
MathNet 2011 Question 82
Math Olympiad Vault · MathNet 2011