A function f(x)=∣x2−9∣−∣x+3∣f(x) = |x^2 - 9| - |x + 3|f(x)=∣x2−9∣−∣x+3∣. Determine all intervals of xxx such that f(x)<0f(x) < 0f(x)<0.
x∈(−3,2)x \in (-3, 2)x∈(−3,2)
x∈(−3,3)x \in (-3, 3)x∈(−3,3)
x∈(−4,−3)x \in (-4, -3)x∈(−4,−3)
x∈(2,4)x \in (2, 4)x∈(2,4)