If the function f (x) = x ^ 2-3x-k has zeros on (- 1, 1), then the value range of K

If the function f (x) = x ^ 2-3x-k has zeros on (- 1, 1), then the value range of K

f(x)=x^2-3x-k
Axis of symmetry x = 3 / 2
f(-1)>0
f(1)