The graph is crossing x-axis at the points
a) -1
b) 5
c) 8
This means x + 1, x - 5 and x - 8 are the factors of the given polynomial. We can express the polynomial as the product of its factors. So the given polynomial can be expressed as (x + 1)(x - 5)(x - 8).
Thus, the correct answer to this question is option D
