Answer:
(x + 5) (x^2 -3)
Step-by-step explanation:

Do the grouping:

Then factor out
in the first and −3 in the second group.

Factor out the common term x + 5 by using the distributive property.
Polynomial
is not factored in since it does not have any rational roots, thus getting the following:

X=21
See photo I provided below
Answer: B) there is not enough information to tell since they are not between parallel planes
Step-by-step explanation:
The least value would be -10 and the greatest would be -2. How I know is because on the negative side the number closer to zero is bigger and he farther is less.