F (x) = x & # 178; ten 2x + L, then f (X-5)? Do you want to put X-5 as a whole in a question like this What does f (x) matter?

F (x) = x & # 178; ten 2x + L, then f (X-5)? Do you want to put X-5 as a whole in a question like this What does f (x) matter?

Is to replace x with X-5
For example, f (X-5) = (X-5) ^ 2 + 2 (X-5) + 1