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WAEC Mathematics 2003 Question 30

Question 30

Graphs of Functions

The graphs above are for the relations y = ax2 + bx + c and y = d − x. What are the values of x for which ax2 + bx + c = 0?

Diagram for this question
  1. A.2, 1
  2. B.−2, −1
  3. C.−2, 1
  4. D.−1, 2
Show the answer and explanation

Answer: D (−1, 2)

Explanation

The roots are where the curve crosses the x-axis: x = −1 and x = 2.