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:

1 to 3
2 to 6
3 to 9
4 to 12
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X midpoint: -1
Y midpoint: -0.5