The equation of line and circle If the line 3x + 4Y + k = 0 is tangent to the circle (x-3) ^ 2 + y ^ 2 = 4, then the value of K is equal to

The distance from the center of the circle (3,0) to the tangent is equal to the radius r = 2
|-9+0+k|/√(9+16)=2
|k-9|=10
k-9=±10
k=-1,k=19

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