if f (x)=2^x-1 +3 and g(x) = 5x-9 what is (f-g)(x)
( f - g )( x ) = f( x ) - g( x ) = 2^x-1 + 3 - 5x + 9 = 2^x-1 - 5x + 12 ;
\(( f - g )( x )\)_________________\(f(x) - g(x)\)\(= ( 2^{x-1} +3) - (5x-9)\) \(= 2^{x-1} - 5x + 12\)
