F (x) = - x² + x + 13

Find f (9)

103.

Step-by-step explanation:

If you plug in 9 for the value of x in the equation, 103 is your answer.

f (9) = - 59

Step-by-step explanation:

to find f (9), just substitue 9 for every x value in the equation

for example:

f (x) = - x² + x + 13

substitute in 9 for the x values

f (9) = - 9² + 9 + 13

solve and add like terms

f (9) = - 59