F(x)=-5

write a new equation

f(2x)

f(2x) = -5

Step-by-step explanation: Here we know that the function f(x) = -5

this means that the function is a constant function, it does not depend on the value of x that is introduced in it.

Then if we evaluate it in 2x, the result is the same (again, it does not depend on the value of x)

f(2x) = -5