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JAMB Mathematics 1982 Question 24

Question 24

Algebraic Expressions

Find the values of x for which the expression (x − 3)(x − 2)/(x2 + x − 2) is undefined

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

Answer: A (1, −2)

Explanation

A fraction is undefined when its denominator is zero: x² + x − 2 = (x + 2)(x − 1) = 0, so x = 1 or −2.