Answer:
This can be expanded to x⁴ - 6x²
Step-by-step explanation:

Answer:
5/16m long.
Step-by-step explanation:
- 5/8 ÷ 2/1
- 5/8 × 1/2
- =5/16m long.
Answer:

Step-by-step explanation:
The given equation is 
Group similar terms to get:


Square both sides to obtain:


Add 6 to both sides

Simplify the right hand side to obtain;

What exactly are you asking?
My guess would be A, but I may be wrong