Pair Of Straight Lines Question 59
Question: If the equation $ 12x^{2}-10xy+2y^{2}+11x-5y+k=0 $ represents two straight lines, then the value of k is
[MP PET 2003]
Options:
A) 1
B) 2
C) 0
D) 3
Show Answer
Answer:
Correct Answer: B
Solution:
Condition for pair of lines, $ abc+2fgh-af^{2}-bg^{2}-ch^{2}=0 $ Here, a = 12, h = -5, b = 2, g = 11/2, f = -5/2, c = k. On solving, $ k=2 $ .
BETA
