If \(\sqrt{x}\) + \(\frac{1}{\sqrt{x}}\) = 3, then find the value of x² + \( \frac{1}{x^2} \).
Kunal was asked to find \( \frac{5}{6} \) times of a number. He multiplied it by \( \frac{6}{5} \). As a result, he got an answer which was more than the correct answer by 572. The number was: