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Sketch the curve y = x^2 + 5 , and the point (0,-6) on the same...

Sketch the curve y = x^2 + 5 , and the point (0,-6) on the same
coordinates. Find the equations of the lines that pass through the point
(0,-6) and tangent to the curve y = x^2 +5 at the point x = a. (Hint there
are two values of a : a > 0 and a < 0 )

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