JEE Main Mathematics question

Mathematics Straight Lines JEE Main

If the equation represents a pair of lines, then is equal to

(A)
(B)
(C)
(D)Correct

Answer: (D)

Solution

With , , , , , : ABC+2FGH-AF^2-BG^2-CH^2=2-k+1. . , option (D).

Question ID VK-024335