Answer:
To find the zeros of the function f(x) = x^2 + 9x - 36, we need to solve for x when f(x) = 0.
We can use the quadratic formula to solve for x:
x = (-b ± sqrt(b^2 - 4ac)) / 2a
In this case, a = 1, b = 9, and c = -36.
x = (-9 ± sqrt(9^2 - 4(1)(-36))) / 2(1)
x = (-9 ± sqrt(441)) / 2
x = (-9 ± 21) / 2
So the zeros of the function are x = -6 and x = 3.