Straight Line Question 175
Question: Let the equations of two sides of a triangle be $ 3x-2y+6=0 $ and $ 4x+5y-20=0 $ . If the orthocenter of this triangle is at $ (1,1) $ and the equation of its third side is $ ax+by+c=0, $ then $ a+b-c $ is
Solution:
Answer: 1579