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WAEC Mathematics 2013 Question 6

Question 6

Surds

If √50 − K√8 = 2/√2, find K.

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

Answer: D (2)

Explanation

5√2 − 2K√2 = √2, so 5 − 2K = 1 and K = 2.