You can
put this solution on YOUR website!
Hi,
Re TY, Yes, you certainly had the right idea!

Yes. Consider when the denominator is zero
3x^2 + x = 0
x(3x+ 1) = 0
x = 0
Or (3x+ 1) = 0
x = 0 Or x = -1/3 makes the denominator zero and make 4x/3x^2+x undefined