Final answer:
To find the input of the function g(x) = 2x - 4 for an output of zero, set g(x) to zero and solve for x. The solution is x = 2.
Step-by-step explanation:
We need to solve for x when given the function g(x) = 2x - 4 and the output g(x) = 0. To do this, set the function equal to zero and solve for x:
g(x) = 2x - 4 = 0
Add 4 to both sides:
2x = 4
Divide both sides by 2:
x = 4 / 2
x = 2
The input of the function that gives us an output of zero is x = 2.