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Kayleigh Padberg

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3y ago
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12y ago

A root of a polynomial can be found when the same polynomial is set equal to zero and factorised.

If x = -2 is a root then (x - (-2)) = (x + 2) is a factor.

So for a polynomial of degree three where x = -2 is the only root (repeated root)

then the polynomial is, (x + 2)3 = 0 which expands to, x3 + 6x2 + 12x + 8 = 0.

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Q: Is it possible to find a polynomial of degree 3 that has -2 as its only real zero?
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No. A polynomial can have as many degrees as you like.


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