Pair Of Straight Lines Question 29
Question: If in general quadratic equation $ f(x,y)=0 $ , $ \Delta =0 $ and $ h^{2}=ab $ , then the equation represents
Options:
A) Two parallel straight lines
B) Two perpendicular straight lines
C) Two coincident lines
D) None of these
Show Answer
Answer:
Correct Answer: A
Solution:
$ f(x,y)=0 $ gives us an equation $ \Delta =0 $ gives us a pair of straight lines. $ h^{2}=ab $ gives angle between them equal to zero. Hence equation represents two parallel lines.
BETA
