A student by trial discovers one ve and 2 ve roots of the equation x 5 9x 4 13x 3

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A student by trial discovers one -ve and 2 +ve roots of the equation,x^5 - 9x^4 + 13x^3 + 57x^2 - 86x - 120 = 0.How many non-real roots does the equation have?Please explain.

1) 2
2) 1
3) 0
4) 4
5) None of these: Asked In MBA (11 years ago); Unsolved; Is this Puzzle helpful? (0) (0) Submit Your Solution

Dimple

India

Punjab

Time: 00:01:33

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Latest MBA Aptitude Question SOLUTION: A student by trial discovers one -ve and 2 +ve roots of the equation,x^5 - 9x^4 + 13x^3 + 57x^2 - 86x - 120 = 0.How many non-real roots does the equation have?Please explain.