Verify whether $2$ and $5$ are zeros of the polynomial $x^{2}-2x-15$ or not.

(D) Let the polynomial be $p(x) = x^{2} - 2x - 15$.
To verify if $2$ is a zero,we calculate $p(2)$:
$p(2) = (2)^{2} - 2(2) - 15 = 4 - 4 - 15 = -15$.
Since $p(2) \neq 0$,$2$ is not a zero of the polynomial.
To verify if $5$ is a zero,we calculate $p(5)$:
$p(5) = (5)^{2} - 2(5) - 15 = 25 - 10 - 15 = 0$.
Since $p(5) = 0$,$5$ is a zero of the polynomial.