If f(x) is = to 0 then that means that you would have to plug the 0 in for all of the x that are in the function and the solve it.
f(x)= x3-4x-1
f(0)= (0)3-4(0)-1
0 0 0 -1
-1
so that means that -1 would be the answer for the function
If you are talking about on Brainly.com it is like this.
To write half write 1/2 (1 forward slash 2)
Angle A: 60 degrees
Angle B: 30 degrees
Angle C: 90 degrees
Sorry if it’s wrong but i think it’s B
sorry if i got it wrong
