I am begging for help with this calculus problem!!?

Question

All the real zeros of an equation are –1, 3, and 4. To solve its corresponding inequality, determine the sign in the intervals:

a) x < –1, –1 < x < 4, x > 4
b) x < 3, 3 < x < 4, x > 4
c) x < –1, –1 < x < 3, 3 < x < 4, x > 4
d) y < –1, –1 < y < 4, 3 < y < 4, y > 4

Answer 1

c.
You need to know the behavior of every interval that doesn't cross the x-axis, or in other words, every interval before, between, or after its zeros.