Question

The equation of the line joining origin to the points of intersection of the curve $x^{2} + y^{2} = a^{2}$ and

$x^{2} + y^{2} - ax - ay = 0$ is

• A. $x^{2} - y^{2} = 0$
• B. $xy = 0$
• C. $xy - x^{2} = 0$
• D. $y^{2} + xy = 0$

Answer 1

Answer: (B)

$xy = 0$

Answer 2

Clearly from figure $xy = 0$ represents the pair of straight lines.

i.e., combined equation of both axes.