help in functions of mathematics?

Question

if f(x)=x^2
then what is
1) f(x-a)
2 f((x/2)-1)

please help!

Answer 1

Just substitute the value inside the () for x in the first equation. So 1) becomes (x-a)^2 or if expanded x^2 -2xa +a^2

The same thing for 2) replace x with ( (x/2) - 1)

Answer 2

1) f(x-a) = (x-a)^2
2 f((x/2)-1) = [(x/2)-1]^2

Answer 3

f(x-a) = (x-a)^2

f(x/2)-1)) = [(x/2)-1]^2