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Radical axis of x² + y² + 2x + 3y - 5 = 0 and x² + y² + 4x + y - 7 = 0?
A3x + 2y = 6
Bx + y + 1 = 0
Cx - y - 1 = 0
Dx - y + 1 = 0
Answer & Solution
Correct answer: C. x - y - 1 = 0
Subtracting the second equation from the first gives -2x + 2y + 2 = 0, which simplifies to x - y - 1 = 0.
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