one zero is given. List all zeros of the polynomials.?

Question

one zero is given. List all zeros of the polynomials.
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Answer 1

Let p(x) = x³ - 3x -2.
Since -1 is a root, x + 1 is a factor of p(x).
Next, p(x)/(x+1) = x² - x -2 = (x+1)(x-2)
Thus -1 is a double root of p(x) and 2 is the other root.