Question 359076
36-x^2/x^2-9
36-x^2/(x+3)(x-3)
X cannot be -3 or +3 because then there would be division by zero which is not allowed.
(-infinity, -3)(-3, 3)(3, infinity)domain of f(x).
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Ed
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{{{graph(500,500,-10,10,-10,10,(36-x^2)/(x^2-9))}}}