SOLUTION: find the domain of: Squere root of (9

SOLUTION: find the domain of: Squere root of (9 - X^2)

Question 548533: find the domain of:
Squere root of (9 - X^2)
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
exists only when
Factoring, we find that

The zeros of that(polynomial) expression are and
At each of those points, one (and only one) of the factors changes sign, and the expression changes sign.
For ,
So for , and the domain of the function is only those values of x, in other words, the closed interval [-3,3].
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