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Thefactorof the polynomial is (3x + 1).To find the factors of the quadratic polynomial 3x² + 10x + 3, you can use the factoring method.First, try to factor it into twobinomials:3x² + 10x + 3We're looking for two binomials of the form (ax + b)(cx + d) that multiply to the givenpolynomial. The only way to factor this polynomial is:(3x + 1)(x + 3)So, among the given options, the factor of the polynomial is (3x + 1).To know more aboutfactor:brainly.com/question/34290719#SPJ3...