If x4 + 1/(x^4) = 27887, the positive value of x + 1/x is?

x⁴ + \(\frac{1}{x^4}\) = 27887

x² + \(\frac{1}{x^2}\) = \(\sqrt {27887 + 2}\) = 167

So, x + \(\frac{1}{x}\) = \(\sqrt {167 + 2}\) = 13