If f (2x-1) = 4x ^ 2 + 4x + 2, what is f (x) equal to?

If f (2x-1) = 4x ^ 2 + 4x + 2, what is f (x) equal to?

Because f (2x-1) = 4x ^ 2 + 4x + 2 = (2x-1) ^ 2 + 4 (2x-1) + 5
So f (x) = x ^ 2 + 4x + 5