CircleHard
Question
Which of the following is the equation of a circle?
Options
A.x2 + 2y2 − x + 6 = 0
B.x2 − y2 + x + y + 1 = 0
C.x2 + y2 + xy + 1 = 0
D.3(x2 + y2) + 5x + 1 = 0
Solution
Equation 1 is of ELLIPSE
Equation 2 is of pair of straight line
Equation 3 is of ELLIPSE
Equation 4 is of Circle
for a circle equation Co-efficient of X and Y must be same and No XY Coefficient.
Basic Property
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