The product of polynomials \( 3 x^{3}-4 x^{2}+7 \) and \( x^{2}+1 \) is (a) \( 3 x^{5}-4 x^{4}+3...

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The product of polynomials \( 3 x^{3}-4 x^{2}+7 \) and \( x^{2}+1 \) is
(a) \( 3 x^{5}-4 x^{4}+3 x^{3}+3 x^{2}+7 \)
(b) \( x^{5}+4 x^{2}-2 x+3 \)
(c) \( 3 x^{5}-4 x^{4}-3 x^{3}+4 x+8 \)
(d) \( 3 x^{5}-5 x^{4}+8 x^{2}+2 x+1 \)
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