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WAEC Further Mathematics 2017 Question 23

Question 23

Surds

Simplify: √128/(√32 − 2√2).

  1. A.4√2
  2. B.3√2
  3. C.3
  4. D.4
Show the answer and explanation

Answer: D (4)

Explanation

√128 = 8√2 and √32 = 4√2, so 8√2/(2√2) = 4.