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the equation ax^(2)+ 2hxy + by^(2) + ...

the equation `ax^(2)+ 2hxy + by^(2) + 2gx + 2 fy + c=0` represents an ellipse , if

A

`a=h=2,b=0`

B

`b=h=2, a=0`

C

`a=b=2, h=0`

D

none of these

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The correct Answer is:
C
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MCGROW HILL PUBLICATION-CIRCLES AND SYSTEMS OF CIRCLES -EXERCISE (LEVEL 1 ( SINGLE CORRECT ANSWER TYPE QUESTIONS ))
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