For the function f defined by f(x)=3x+4
9x-2
I know that for a I substitute x with -2. I just don't know how to solve b,c, & d. The letters are throwing me off.
a. f(-2)=
b. f(-x)=
c. -f(x)=
d. f(x+h)=
To learn how to evaluate functions at variables or expressions (instead of only at a number), try some online lessons.