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PA² exceeds PB² by 8, with A the origin and B(4, 0). P lies on
Ax = 2
Bx = 4
Cx = 3
Dy = 3
Answer & Solution
Correct answer: C. x = 3
x² + y² - (x - 4)² - y² = 8x - 16, and setting it to 8 gives x = 3.
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