Find (f - g)(x) of the following given functions.
6. f(x) = 2x2 + 3x - 4; g(x) = 2x + 3
7. f(x)=x2-3;g(x) = 2x + 5
8.f(x) = x2 - 7; g(x) = 5x + 4
9. f(x) = *: g(x) = 2x - 4
10. f(x) = x2 + 7x - 2; g(x) = x + 4​