From the list below select all factors in the complete factorization of 3x 3 +4x

Question

From the list below select all factors in the complete factorization of    3x3+4x2-15x

a.) x                                                   b.) 3x  

c.) x-3                                                d.) 3x-5  

e.) x+5                                               f.) x+3  

g.) 3x+5                                            h.) 3x-15  

i.) 3x2-5                                             j.) none... the polynomial is prime

I think the answer is A but am unsure about determining if a polynomial is prime.

Explanation / Answer

3x3+4x2-15x = x(3x^2+4x-15) = x(3x-5)(x+3)

so the answer is a,d,and f.

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