Evaluate the function f(x)=x² + 2x-5 at the given values of the independent variable and simplify.
a. f(1)
b. f(x + 5) c. f(-x)
a. f(1) = (Simplify your answer.)
b. f(x+5)=
c. f(-x) =
point(s) possible
(Simplify your answer.)
(Simplify your answer.)