Consider the graph of the polynomial function p (x) = (x-1) (x+2) (x+5)

The graph of the polynomial function is similar to a cubic function. It is a discontinuous function, with non-included values in the domain which are:

p (x) = (x-1) (x+2) (x+5)

solve for the zeros of the function, these are the discontinuities of the function

0 = x - 1

x = 1

0 = x + 2

x = - 2

0 = x + 5

x = - 5