\( A(3,7) \) and \( B(6,5) \) are two points.
\( C: x^{2}+y^{2}-4 x... VIDEO
\( A(3,7) \) and \( B(6,5) \) are two points.
\( C: x^{2}+y^{2}-4 x-6 y-3=0 \) is a circle.
If \( O \) is the origin and \( P \) is the centre of \( C \), then difference of the squares of the lengths of the tangents from \( A \) and \( B \) to the circle \( C \) is equal to
(a) \( (A B)^{2} \)
(b) \( (O P)^{2} \)
(c) \( \left|(A P)^{2}-(B P)^{2}\right| \)
(d) none of these
(W)
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