Find the Roots (Zeros) k(x)=1/((x+5)(x-2)(x-7))

$k (x) = \frac{1}{(x + 5) (x - 2) (x - 7)}$

Set $\frac{1}{(x + 5) (x - 2) (x - 7)}$ equal to $0$ .

$\frac{1}{(x + 5) (x - 2) (x - 7)} = 0$