1.

The equation of the circle whose two diameters are x = 2y and 2x + y = 0 and radius = 5 is

A. x2 + y2 - 25 = 0
B. x2 + y2 + 25 = 0
C. x2 + y2 + 15 = 0
D. - x2 - y2 – 25 = 0
Answer» B. x2 + y2 + 25 = 0


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