Answer
Expression is undefined when
x=$\frac{-7}{3}$ or x=-2
Work Step by Step
Expression is undefined when
3$x^{2}$+13x+14=0
3$x^{2}$+6x+7x+14=0
3x(x+2)+7(x+2)=0
(3x+7)(x+2)=0
3x+7=0 or x+2=0
3x=-7 or x=-2
x=$\frac{-7}{3}$ or x=-2