5. The length of the tangents from any point of the circle 15x+15y-48x+64y=0 to the two circles 5x+5y-24x+32y+75=0,5x+5y-48x+64y+300=0 are in the ratio

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15 x^{2} + 15 y^{2} - 48 x + 64 y = 0

5 x^{2} + 5 y^{2} - 24 x + 32 y + 75 = 0, 5 x^{2} + 5 y^{2} - 48 x + 64 y + 300 = 0

15 x^{2} + 15 y^{2} - 48 x + 64 y = 0

5 x^{2} + 5 y^{2} - 24 x + 32 y + 75 = 0, 5 x^{2} + 5 y^{2} - 48 x + 64 y + 300 = 0

15 x^{2} + 15 y^{2} - 48 x + 64 y = 0

5 x^{2} + 5 y^{2} - 24 x + 32 y + 75 = 0,

5 x^{2} + 5 y^{2} - 48 x + 64 y + 300 = 0.

(- 1, 2)

x^{2} + y^{2} - 8 x + 5 y - 7 = 0

x^{2} + y^{2} + 15 x - 17 y + c^{2} = 0

x^{2} + y^{2} + 15 x - 17 y + 21 = 0 i s \sqrt{5}

c

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