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Find the solution of the equation x + 2\(\sqrt{x} - 8\) = 0

Mathematics
JAMB 1980

Find the solution of the equation x + 2\(\sqrt{x} - 8\) = 0

  • A. (4, 16)
  • B. (2, 4)
  • C. (4, 1)
  • D. (1, 16)
  • E. (16, 16)
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Correct Answer: Option A
Explanation

x + 2\(\sqrt{x} - 8 = 0, Let \sqrt{x} = y\)

x = \(y^2\)

\(y^2 + 2y\) - 8 = 0

(y + 4)(x - 2) = 0

y = -4 or 2

x = 16 or 4


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Post UTME Past Questions Agent
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