In 2D space given 2 circles and position , how many tangents can be drawn ?
What is the length of tangent drawn from -LSB- math -RSB- -LRB- 5,1 -RRB- -LSB- / math -RSB- to the circle -LSB- math -RSB- x ^ 2 + y ^ 2 +6 x-4y-3 = 0 -LSB- / math -RSB- ?