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A point stays 5 units from the origin. Its locus is
Ax^2 + y^2 = 5
Bx^2 + y^2 = 25
Cx^2 - y^2 = 25
Dx + y = 5
Answer & Solution
Correct answer: B. x^2 + y^2 = 25
Squaring the distance condition sqrt(x^2+y^2) = 5 gives x^2 + y^2 = 25.
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