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2011 AMC 10A Question 16

AMC10 · 2011 AMC 10A

Question 16

Which of the following is equal to $\sqrt{9-6\sqrt{2}}+\sqrt{9+6\sqrt{2}}?$
  1. $3\sqrt2$
  2. $2\sqrt6$
  3. $\dfrac{7\sqrt2}{2}$
  4. $3\sqrt3$
  5. $6$