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Find the radical axis of x²+y²=9 and x²+y²-4x-5=0.
Ax = -1
Bx = 1
Cx = 4
Dx = 2
Answer & Solution
Correct answer: B. x = 1
Subtracting the two equations leaves 4x - 4 = 0, so the radical axis is x = 1.
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