Question

Does anyone know this?

Answer 1

f(9)= -59

Explanation:

First, put 9 into x; which gives you...

f(9)= (-9)^2+9+13

f(9)= -81+9+13

f(9)= -59

Answer 2

f(x) = -x^2 + x + 13 find f(9) = -59

Hope this helps :)