Answer:
12,156,2029
Step-by-step explanation:
I'm pretty sure the formula to calculate B would be the square root of d + 4ac.
With the symbols given us the symbol for ten and use the symbol for zero 3 times
line N has slope m = 
given a line with slope m then the slope of a line perpendicular to it is
= - 
thus line N has slope -
= 

Why?
We have the isosceles right triangle. The length of legs are 6. Use the Pythagorean theorem:

In general, the formula for calculating the hypotenuse in an isosceles right triangle is 
a - a leg, h - a hypotenuse