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Integral solutions of x^5-31x+2015

Source: MTRP 2015 Class 11-Multiple Choice Question: Problem 5 :-

September 21, 2020
number theory

Problem Statement

How many integral solutions are there of the equation x5āˆ’31x+2015=0x^5 -31x+2015=0 ?
[*] 2 [*] 4 [*] 1 [*] None of these