Answer: B) fog(x) = 2x(x^2-1)
Step-by-step explanation: F x G is the combination of f(x) and g(x)
2x x x^2 is basically 2x^3, but must be factored.
2x and x^2 cannot be simplified any more, so the 2x is moved to the left whilst the x^2 is moved to the right.
So, your answer is B.
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