Answer:
D. 
Step-by-step explanation:
The given expression is;

This is the same as;

The denominators are the same.
Subtract the numerators and write one denominator;

Rewrite to get;

Answer:
perpendicular
Step-by-step explanation:
They form a 90 degree angle
Just watch videos on youtube.
Answer:
No real solution
Step-by-step explanation:
There is no perfect squares in 50