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SEAMO 2017 — Paper E — Grade 9–10 Question 9

SEAMO · SEAMO 2017 — Paper E — Grade 9–10

Question 9

Simplify $\sqrt{21+12\sqrt3}-\sqrt{21-12\sqrt3}$.
  1. $2$
  2. $3$
  3. $4$
  4. $5$
  5. None of the above