WAEC Mathematics 2016 Objective — Question 11
Question 11 of 50 from the West African Examinations Council (WAEC) Mathematics 2016 Objective paper, with the correct answer and a full explanation.
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11. Find the values of y for which the expression (y²-9y+18)/(y²+4y-21) is undefined. A. 6,-7 B. 3,-6 C. 3,-7 D. -3,-7
- A. 6,-7
- B. 3,-6
- C. 3,-7Correct
- D. -3,-7
Explanation
Denominator y²+4y-21=0 → (y-3)(y+7)=0 → y=3, y=-7.
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