I'm taking pre-calc and I'm already falling behind this semester.
I'm hoping someone could give me a simple explanation on how to solve these types of problems:
$$f(x) = \log_5(4-x^2)$$
I have the answer, but I don't know how to get to it exactly.
I think I factor whatever is inside of the log. But then what's the point of the log?
Here's a few more problems that are similar:
$$f(x) = \log(x^2 - 13x + 36)$$
$$f(x) = \ln|7 + 28x|$$