Question

Find f(x-3) when f(x)=x-3

Answer 1

f(x-3) = (x-3) -3 = x-6

Answer 2

You always start with f(x)

f(x) = x - 3

The x - 3 part is then inserted in place of x:

f(x - 3) = x - 3 - 3

then you simplify to get:
f(x - 3) = x - 6

Answer 3

thanks

Answer 4

what about f(x+3)? would that just be x?

Answer 5

By default, f(x) will always be your original function, so if you see f(x+3), you know that x was replaced with x + 3

Answer 6

ok