How do I find the domain of $y=4-x^2$ ?

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Answer 1 · 2015-03-02T11:35:11

A quadratic functions, as all the polinomyal functions, don't have any restrictions.

So the domain is $(-oo,+oo)$ .
graph{4-x^2 [-11.25, 11.24, -5.62, 5.63]}

How do I find the domain of y=4-x^2y=4-x^2?