Answer: D
Step-by-step explanation:

Answer:
6 and -6
Absolute value mans the distance a number is away from 0.
Answer:
200
Step-by-step explanation:
Work backward: Multiply out (x-8i) and (x+8i).
The product is x^2 - [64i^2], or x^2 - [-64], or x^2 + 64
This is equivalent to 1x^2 + 0x + 64, and so a=1, b=0 and c=64.