What values of $x$ are not in the domain of the expression $(x+5)/(3x^2+23x-36)$ ?

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Answer 1 · 2017-03-13T05:11:32

$D_f in R-{9,-4/3}$

$(x+5)/(3x^2+23x-36)$

The denominator should not be zero.

$3x^2+23x-36!=0$

$3x^2+27x-4x-36!=0$

$(x-9)(3x+4)!=0$

$x!= 9$ and $x!=-4/3$

$D_f in R-{9,-4/3}$

What values of xx are not in the domain of the expression (x+5)/(3x^2+23x-36)(x+5)/(3x^2+23x-36)?