If c and k are the roots of 6 - x - x 2 =
MATHEMATICS
WAEC 2009
If c and k are the roots of 6 - x - x2 = 0, find c + k
- A. 2
- B. 1
- C. -1
- D. -3
Correct Answer: C. -1
Explanation
6 - x - x2 = 0
a = -1; b = -1; c = 6
Sum of roots = c + k = -\(\frac{-b}{a}\)
= \(\frac{-(-1)}{-1}\)
= -1
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