Question

Hi, could you please tell me how to get the real rational zeros of the function;

f (x) = x3 + x + 1

I'm having trouble with it; P/Q gave me +/- 1 but I couldn't go any further. Thank You.

Answer 1

MJMATH, this function has no rational roots.

Answer 2

The rational roots theorem gives you the possibilities for rational roots. If none of these check out, the polynomial does not have rational roots.

Answer 3

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Answer 4

haha, thank you :D