Rewrite the function by completing the square.
f(x) = x^2 – 10x—96

(x - 5)² -121 = 0

Step-by-step explanation:

if you need to find the roots you can take the square root of each side:

(x-5)² = 121

(x-5)² = 121

square root of (x-5)² is x-5

square root of 121 is ±11

first root:  x-5 = 11

x = 16

second root: x-5 = -11

x = -6

18 cookies

Step-by-step explanation:

if you can buy 3 for $2... the equation will be

so you can buy 5 sets of cookies....

5x3=18

18 cookies