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Most people would say the set of real numbers, R, but it's actually the set of complex numbers, C, of which R is a subset.
domain = set R ,, all real numbers
all real numbers
The graph is a circle with a radius of 6, centered at the origin
The answer depends on the domain for x. For example, if the domain is x = 7, then the range is 55. If the domain is all Real numbers, then the range is y >= 6.
x[x+1] squared Simplified is, to my knowledge, x squared plus ( x + 1) squared