Prove that the equation of any tangent to the circle $x^{2} + y^{2} - 2 x + 4 y - 4 = 0$ is of the form $y = m (x - 1) + 3 1 + m^{2} - 2 .$

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Prove that the equation of any tangent to the circle

x^{2} + y^{2} - 2 x + 4 y - 4 = 0

is of the form

y = m (x - 1) + 3 1 + m^{2} - 2 .

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Question Text

Prove that the equation of any tangent to the circle

x^{2} + y^{2} - 2 x + 4 y - 4 = 0

is of the form

y = m (x - 1) + 3 1 + m^{2} - 2 .

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