Evaluate the function at the indicated values. (If an answer is undefined, enter UNDEFINED.)

Question

f(x) = x² + 9x

f(0)=

f(3)=

f(-3)=

f(a)=

f(-x)=

f(1/a)=

Answer 1

Simply plug in the given values to get:

f(0) = 0 + 0 = 0

f(3) = 9 + 27 = 36

f(-3) = 9 - 27 = -18

f(a) = a² + 9a

f(-x) = x² - 9x

f(1/a) = 1/a² + 9/a