What is the domain and range of $y= x^2-2$ ?

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Answer 1 · 2015-08-07T18:38:49

There is no restriction on the range (no roots, no fractions)

Since $x^2$ cannot be negative the range is $[-2, oo)$
The $-2$ happens when $x=0$
graph{x^2-2 [-10.08, 9.92, -2.6, 7.4]}

What is the domain and range of y= x^2-2y= x^2-2?