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Find the roots of the quadratic equations by using the quadratic formula in each of the following:
 
\frac{1}{2}x^2 - \sqrt{11}x + 1 = 0
 
The roots are 
and
.
Answer variants:
3 + \sqrt{11}
3 - \sqrt{11}
\sqrt{11} + 3
\sqrt{11} - 3