6a-4 = 3a+54
3a = 58
a = 58/3
a= 19.333
Polynomial :



The rest are not polynomials.
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I hope that helps you out!!
Any more questions, please feel free to ask me and I will gladly help you out !
~Zoey
No 8 is the sum (not factor)of the factors 2 and 4