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Problem with ambiguous question in FP1 watch

1. Hi, i've got this question:

The problem is, they don't tell where the root is except that it's positive - there are two positive roots, one between 0 and 1 and the other between 1 and 0. Usually to find the root i start with trial and error going from 0, but their solution uses the root between 1 and 2, what am i meant to be doing here? Can i just pick any one?

Use linear interpolation to find the positive root of the equation x^3 - 5x + 3 = 0 correct to one decimal place.
2. (Original post by Dylex)
Hi, i've got this question:

The problem is, they don't tell where the root is except that it's positive - there are two positive roots, one between 0 and 1 and the other between 1 and 0. Usually to find the root i start with trial and error going from 0, but their solution uses the root between 1 and 2, what am i meant to be doing here? Can i just pick any one?
It's just a flawed question, as long as you pic one root and carry out the procedure correctly there's nothing to worry about. No exam question will be as ambiguous.

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