The equation (x^(2)+y^(2))(h^(2)+k^(2)-a...

The equation `(x^(2)+y^(2))(h^(2)+k^(2)-a^(2))=(hx+ky)^(2)` represents
a pair of perpendicular lines if

A

(a) `h^(2)+k^(2)=2a^(2)`

B

(b) `(h+k)(h-k)=2a^(2)`

C

(c) `h^(2)+k^(2)=a^(2)`

D

(d) `h^(2)+k^(2)=0`

Verified by Experts

The correct Answer is:

A

NA

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