1. a2 – b 2– c2 – 2bc = 0 , then the family of lines ax + by + c = 0 are concurrent at the points: a. (0,1) b. (1,-1) c. (-1,1) d. none of the above
1. a2 – b 2– c2 – 2bc = 0 , then the family of lines ax + by + c = 0 are concurrent at the points: a. (0,1) b. (1,-1) c. (-1,1) d. none of the above