Answer:
9
Step-by-step explanation:


First in factoring, you must find out what is common in the whole equation

Now, make 2 sets of parentheses and "split up" the rest of the equation
Try to experiment which numbers work out
We are not subtracting anything so both parentheses are positive

Therefore, the factored version of

is
The number of terms in the expression is 2
The domain of a function is the set of the possible input values of the function. For example: consider the function f(x) = cos x, the domain of the function is the set of possible values of x.
The cosine function takes x values from all real numbers.
Therefore, the domain of the cosine function is a real numbers.