Question

6.   Factor the common factor out of 8x3 + 12x. 

       A. 4x(6x2 + 3)   B. x(x2 + 3)   C. 4x(2x2 + 3)   D. 4x2(2x3 + 3) 

Answer 1

Assuming the "3" you placed next to the x (8x"3") is not a coefficient but rather  an exponent then the answer would be, C 4x(2x2 + 3)

Answer 2

Factor out 4x from each monomial

8x³ + 12x

(8x³ + 12x)/4x

4x(2x² + 3) is your answer, or (C)

hope this helps