The equation ax^(2)+2hxy+by^(2)+2gx+2fy+...

The equation `ax^(2)+2hxy+by^(2)+2gx+2fy+c=0` represents a circle if

A

(a) `a=b` and `c=0`

B

(b) `f=g` and `h=0`

C

(c) `a=b` and `h=0`

D

(d) `f=g` and `c=0`

Verified by Experts

The correct Answer is:

C

NA

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