Given the functions, f(x) = 5x2 - 3x + 1 and g(x) = 2x2 + x - 2, perform the indicated operation. When applicable, state the domain restriction.
(f - g)(x).

Options:
1. 3x2 - 4x + 3
2. 3x2 - 2x - 1
3. 3x2 - 4x - 1
4. 3x2 - 2x + 3