Respuesta :

Photon
[tex] \frac{x}{2} + \frac{7}{9x} [/tex]
[tex]= \frac{x*9x}{2*9x} + \frac{7*2}{9x*2} [/tex]
[tex]= \frac{9x^2}{18x} + \frac{14}{18x} [/tex]
[tex] = \frac{9x^2+14}{18x} [/tex]

Therefore the answer is B.

Hope this helps !

Photon