Given function f (x) = x3 + 2x2 - 5x - 6, which of the following is true?

1. (x-3) is a factor because f (-3) = 1.

2. (x + 3) is a factor because f (-3) = 1.

3. (x-3) is a factor because f (3) = 0.

4. (x + 3) is a factor because f (3) = 0.

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Given function f (x) = x3 + 2x2 - 5x - 6, which of the following is true?1. (x-3) is a factor because f (-3) = 1.2. (x + 3) is a factor because f (-3) = 1.3. (x-3) is a factor because f (3) = 0.4. (x + 3) is a factor because f (3) = 0.

Given function f (x) = x3 + 2x2 - 5x - 6, which of the following is true?

1. (x-3) is a factor because f (-3) = 1.

2. (x + 3) is a factor because f (-3) = 1.

3. (x-3) is a factor because f (3) = 0.

4. (x + 3) is a factor because f (3) = 0.