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WAEC Mathematics 1994 Question 16

Question 16

Algebraic Expressions

For what value of x is the expression (x2 + 15x + 50)/(x − 5) not defined?

  1. A.−10
  2. B.−5
  3. C.0
  4. D.5
  5. E.10
Show the answer and explanation

Answer: D (5)

Explanation

A fraction is not defined when its denominator is zero: x − 5 = 0 when x = 5.