Answer:
2. 12/x² is not a polynomial because it has a denominator with a variable
3. 12a²b³c³d⁴ is not a polynomial
4. x²/2 is not a polynomial
5. x²+xy+y³ is a polynomial and it is a trinomial
and has a leading coefficient of 1 with a degree of 3
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Answers & Comments
Answer:
2. 12/x² is not a polynomial because it has a denominator with a variable
3. 12a²b³c³d⁴ is not a polynomial
4. x²/2 is not a polynomial
5. x²+xy+y³ is a polynomial and it is a trinomial
and has a leading coefficient of 1 with a degree of 3