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WAEC Mathematics 2023 Question 50

Question 50

Algebraic Expressions

For what values of x is (x2 + 2)/(10x2 − 13x − 3) undefined?

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

Answer: C (3/2, −1/5)

Explanation

The fraction is undefined when the denominator is zero: 10x² − 13x − 3 = (5x + 1)(2x − 3) = 0, so x = −1/5 or 3/2.