What is the tangent equation of a point m (4, - 3) over the circle x2 + y2 = 25

What is the tangent equation of a point m (4, - 3) over the circle x2 + y2 = 25

The tangent equation of a point m (4, - 3) passing through the circle x ^ 2 + y ^ 2 = 25 is: 4x-3y-25 = 0