The graph above is represented by - JAMB Mathematics 2007 Question
A
y = x3 - 4x2 + 5x - 2
B
y = x3 - 3x - 2
C
y = x3 - 4x + 2
D
y = x3 + 2x2 - x - 2
correct option: d
The roots of the graph are -2, -1 and 1
y = (x + 2)(x + 1)(x - 1) = (x + 2)(x2 - 1)
= x3 + 2x2 - x - 2
y = (x + 2)(x + 1)(x - 1) = (x + 2)(x2 - 1)
= x3 + 2x2 - x - 2
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