If `16a^2 + 25b^2 - c^2 = 40ab`, then the family of lines `ax + by + c = 0` is concurrent at the point(s)

If a^2+b^2-c^2-2ab = 0 , then the family of straight lines ax + by + c = 0 is concurrent at the points

If 4a^2 + 9b^2 - c^2 + 12ab =0 , then the family of straight lines ax + by + c =0 is concurrent at

If a^2-b^2-c^2-2ab=0 , then the family of lines ax+by+c=0 are concurrent at the points

If a^2+b^2-c^2-2ab = 0 , then the family of straight lines ax + by + c = 0

2a+b+2c=0(a,b,c in R), then the family of lines ax+by+c=0 is concurrent at

If 25a^2 + 16b^2 – 40ab – c^2 = 0 , then the family of straight line 2ax + by + c = 0 is concurrent at

If a^(2)+9b^(2)-4c^(2)=6ab, then the family of lines ax+by+c=0 are concurrent at:

If 6a^2-3b^2-c^2+7ab-ac+4bc=0 , then the family of lines ax+by+c=0 is concurrent at

If 6a^2-3b^2-c^2+7ab-ac+4bc-0 , then the family of lines ax+by+c=0 is concurrent at

If 2a^2 - 7ab -ac +3b^2-2bc-c^2=0 then the family of lines ax + by + c=0 are either concurrent at the point P(x_1,y_1) or at the point Q(x_2, y_2) . Find the distance of the origin from the line passing through the points P and Q, the distance being measured parallel to the line 3x-4y=2 .