Question 754751
1/{{{ sqrt(x^2+3x-28 ) }}}=y what is the domain of the relation?
x^2+3x-28>0
(x+7)(x-4)>0
number line:
<..+...-7.....-....4...+....>
Domain: (-&#8734;,-7) U (4,&#8734;)

note: domain for radicans: &#8805;0
but since it is also in the denominator &#8800;0, must be>0.