CircleEasy
Question
A pair of tangents are drawn from the origin to the circle x2 + y2 + 20(x + y) + 20 = 0. The equation of the pair of tangents is-
Options
A.x2 + y2 + 5 xy = 0
B.x2 + y2 + 10xy = 0
C.2x2 + 2y2 + 5xy = 0
D.2x2 + 2y2 − 5xy = 0
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