2013
Mathematics
JAMB
The graph above is correctly represented by
A.
y = x2 - x - 2
B.
y = x2 - 3x + 2
C.
y = x2 - x - 1
D.
y = x2 + x - 2
Correct Answer: y = x2 - x - 2
Explanation
The graph crosses the x-axis at x = -1 and x = 2 Thus, x + 1 = 0 and x - 2 = 0 x2 - 2x + x - 2 = 0 x2 - x - 2 = 0 giving y =x2 - x - 2
The graph crosses the x-axis at x = -1 and x = 2 Thus, x + 1 = 0 and x - 2 = 0 x2 - 2x + x - 2 = 0 x2 - x - 2 = 0 giving y =x2 - x - 2THIS WEEK's
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