Find (f-g)(×) when ×=4

Question

May Problem sa math diko kaya sagutin kaya nahihirapan Ako sumagot nang summative test

Answer 1

(f-g)(x) = f(x) - g(x)

when x=4

(f-g)(4) = f(4) - g(4)

you need more info about f(x) and g(x) to solve the problem further