Find an equation of the tangent line to the curve
\frac{x^2}{9} + \frac{y^2}{36} = 1
(an ellipse) at the point (-2 , -2\sqrt{5}) .

An equation of this tangent line to the ellipse at the given point isy = mx + b , where

m = and
b = .

An equation of this tangent line to the ellipse at the given point is

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