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MATHEMATICS

JAMB 2007 - Question 17

Mathematics 2007 JAMB Past Questions - Question 17: The graph above is represented by.

The graph above is represented by.

A: y=x³-3x-2

B: y=x³+2x²-x-2

C: y=x³-4x²+5x-2

D: y=x³-4x+2

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Correct Answer

Explanation

The roots of the graph are -2, -1 and 1therefore y = (x+2) (x+1) (x-1) = (x+2) (xsup2 -1)= xsup3 + 2xsup2 - x - 2