Pair Of Straight Lines Question 86

Question: The equation $ xy+a^{2}=a(x+y) $ represents

[MP PET 1991]

Options:

A) A parabola

B) A pair of straight lines

C) An ellipse

D) Two parallel straight lines

Show Answer

Answer:

Correct Answer: B

Solution:

$ xy+a^{2}=a(x+y). $ Firstly always check for pair of straight lines i.e., $ \Delta =0 $