Consider function f (x) = -2*(x - 1)*(x + 3), for x ∈ Real Numbers. Attached figure shows a part of graph of "f" .
(a) For this graph of f : (i) Find X-coordinate of all intersections with X-axis . (ii) Find coordinates of VERTEX.
Function f can be written in form f (x) = -2*(x-h)2 + k .
(b) Write values of h and k .
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