If 2x2 - 6x = 1, then \(x^{2} + \dfrac{1}{4x^{2}}\) =?
8
12
9
10
D. 10
If \(x + \frac{1}{x} = 7\), then \(x^{3} + \frac{1}{x^{3}}\) is equal to:
322
340
343
161
A. 322