Answer:
Step-by-step explanation:
Subtract 3 from both sides
8n^2 + 16n - 64 = 0
Divide through by 8
n^2 + 2n - 8 = 0
You should be able to see the factors.
(n - 2)(n + 4) = 0
n - 2 = 0
n = 2
n + 4 = 0
n = -4
