In Exercises 1 and 2, find (f + g)(x) and (f-g)(x) and state the domain of each. Then evaluate + g
and f-g for the given value of x. (See Example 1.)
▶1. f(x)=x²+3x-18.8(x)=-2x+6; x=3
2. f(x) = x²-6x+8, g(x)-x-5; x=