Answer:
Step-by-step explanation:
This is an geometric series.
Common ratio = second number÷ first number

To get the next number, 256 should be divide by (-4)

The three numbers are : -64 , 16 , -4
The differnce of 2 perfect cubes
remember
a³-b³=(a-b)(a²+ab+b²)
so
I didn't really get the which part because we shape it to serveral factors, this is one of them
Start with 8*2=16
116-8= 108
108(16)=1728
3^2+4=13 13(1728)=22464
4(22464)=89856
The answer is 89,856