If x - \(\frac{1}{x}\) = 4\(\sqrt{30}\) then find the value of  ( x + \(\frac{1}{x}\) )

20 22 21 25

22

⇒ If x - \(\frac{1}{x}\) = a then x + \(\frac{1}{x}\) = \(\sqrt {a^2 + 4}\) Here, x - \(\frac{1}{x}\) = 4\(\sqrt{30}\), then  ⇒ x + \(\frac{1}{x}\) = \(\sqrt {(4\sqrt{30})^2 + 4}\) = 22