Answer: undefined in both cases.Explanation:1) Expression to evaluate:

2) You are asked to evaluate that expression for two different cases,
x = 0 and x = 3.3) First case:
x = 0The expression cannot be evaluated at x = 0, because the
denominators (both denominators)
equal 0, and the division by 0 is not defined.
So, the answer is
undefined.
4) Second case,
x = 3When you replace x = 3 you get:

Again, this result in a
division by 0, so you conclude that it is
undefined too.
F(x) = x (x^3 - x^2 + x + 1)
I’m not sure but i think 66 hours because both pumps must fill half of the pool which would split the timing for each which would make pump 1 take 36 hours to fill half and pump two take 30 hours to fill the rest. when you add these hours it equals 66. i hope i helped :)