Given that the function f (x) = x + m / x, and the function image passes through the point (1,5), what is the value of the real number m

Given that the function f (x) = x + m / x, and the function image passes through the point (1,5), what is the value of the real number m

Substituting point (1,5) into f (x), we can get: 5 = 1 + m, then M = 4