Mathematics, 21.06.2021 20:00 venecia53

1:prove that the tangent at the point (1,-2) to the circle x²+y²=5 also touches the circle x²+y²-8x+6y+20=0 .Also find the point of contact. 2:find the length of tangent to the circle
3x²+3y²-7x-6y=12 drawn from (6,-7)

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1:prove that the tangent at the point (1,-2) to the circle x²+y²=5 also touches the circle x²+y²-8x+6y+20=0 .Also find the point of contact. 2:find the length of tangent to the circle 3x²+3y²-7x-6y=12 drawn from (6,-7)​

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1:prove that the tangent at the point (1,-2) to the circle x²+y²=5 also touches the circle x²+y²-8x+6y+20=0 .Also find the point of contact. 2:find the length of tangent to the circle
3x²+3y²-7x-6y=12 drawn from (6,-7)