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SASMO 2021 Grade 8 Question 14

SASMO · SASMO 2021 Grade 8

Question 14

Let $x=\sqrt{16+2\sqrt{15}}$. Find $2x-x^2+2021$.
  1. 2005
  2. 2006
  3. 2007
  4. A number from 2008 to 2021
  5. None of the above