11b: use your graphic display calculator to find the zero of f(x).
I need help with these two problems please!

Answer:
The answer to your question is below
Step-by-step explanation:
f(x) = 27/x² - 16x
Evaluate the function when x:
x f(x)
-4 27/(-4)² - 16(-4) = 27/16 + 64 = 65.69
-3 27/(-3)² - 16(-3) = 27/9 + 48 = 51
- 2 27/(-2)² - 16(-2) = 27/4 + 32 = 38.75
- 1 27/(-1)² - 16(-1) = 27/1 + 64 = 91
1 27/(1)² - 16(1) = 27/1 - 16 = 11
2 27/(2)² - 16(2) = 27/4 - 32 = -25.25
3 27/(3)² - 16(3) = 27/9 - 48 = -45
See the graph below