Question

Let f(x) = 3x +2 and g(x) = 7x + 6. Find f • g and its domain.

Answer 1

The value of f·g is the product of f(x) and g(x). This is shown below,
                                 f·g = (3x + 2)(7x +6)
                                 f·g = 21x² + 32x + 12
The domain of the function is the value of x that would make the function reasonable. The domain is all real numbers. 

Answer 2

21x2 + 32x + 12; all real numbers is the answer