If the part inside the square root is negative, there are imaginary roots. Otherwise they are real.
Answer:
The slop is undefined
i.e. 
Step-by-step explanation:
Considering the slope formula

As the points are (7, -4) and (7, 0)
Here:

so



Therefore, the slop is undefined i.e. 
The answer is 4 bc 4a+8b+4c=1. 4a*4=16a 8b*4=32b and 4c*4=16c so 1*4=4. since ur finding four times as much of the first problem then 16a+16c+32b=4