SOLUTION: 1/{{{ sqrt(x^2+3x-28 ) }}}=y what is the domain of the relation?

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Question 754751: 1/+sqrt%28x%5E2%2B3x-28+%29+=y what is the domain of the relation?
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
1/+sqrt%28x%5E2%2B3x-28+%29+=y what is the domain of the relation?
x^2+3x-28>0
(x+7)(x-4)>0
number line:
<..+...-7.....-....4...+....>
Domain: (-∞,-7) U (4,∞)
note: domain for radicans: ≥0
but since it is also in the denominator ≠0, must be>0.