Question:

What are the possible rational zeros of f (x) = x^4 + 2x^3 - 3x^2 - 4x + 20?

Choices:

1, 2, 4, 5, 10, 20

ą 1, ą 2, ą 3, ą 4, ą 5, ą 6, ą 7, ą 8, ą 9, ą 10, ą 11, ą 12, ą 13, ą 14, ą 15, ą 16, ą 17, ą18, ą 19, ą 20

ą 1, ą 2, ą 4, ą 5, ą 10, ą 20

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20

Question

Mathematics

Alice

17 July, 09:48

Question:

What are the possible rational zeros of f (x) = x^4 + 2x^3 - 3x^2 - 4x + 20?

Choices:

1, 2, 4, 5, 10, 20

ą 1, ą 2, ą 3, ą 4, ą 5, ą 6, ą 7, ą 8, ą 9, ą 10, ą 11, ą 12, ą 13, ą 14, ą 15, ą 16, ą 17, ą18, ą 19, ą 20

ą 1, ą 2, ą 4, ą 5, ą 10, ą 20

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20

+4

Answers (1)

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Foxy Lady · Answer 1

I think just the "possible" ones, without fully factoring, are based on factors of the last whole number - - + 20.

So factors of 20: 1, 2, 4, 5, 10, 20