Let f = {( - 2,1),(0, - 2)} and g = {( - 2, - 4),(3,0),(5,6)}. Find g - f and its domain. What is the domain of g - f?

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Let f = {( - 2,1),(0, - 2)} and g = {( - 2, - 4),(3,0),(5,6)}.Find g - f and its domain.What is the domain of g - f?(Use a comma to separate your answers.)