Polynomial :
[tex] {3x}^{2} - {5x}^{4} + 2x - 12[/tex]
[tex] {x}^{5} - {5x}^{4} + {4x}^{3} - {3x}^{2} + 2x - 1[/tex]
[tex] {x}^{3} - {7x}^{2} + 9x - {5x}^{4} - 20 [/tex]
The rest are not polynomials.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
I hope that helps you out!!
Any more questions, please feel free to ask me and I will gladly help you out !
~Zoey