Answer :
The domain will be all real numbers, range will be all real numbers below -3
Domain and range of function
The domain is the input value for which a function exists while the range is the output value for which a function exist.
Given the function f(x) = -(x+3)(x - 1)
From the graph you can see that the quadratic graph goes forever left and right but the vertex has a y value of -3 showing that it is a negative sloped graph, so anything below that is in the range.
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