Respuesta :

In a polynomial, the variable cannot be in a root, dividing, or raised to a negative number. Then, the following expressions are not polynomials:

[tex]\begin{gathered} x^{-2}+x+1 \\ x^2+2\sqrt[]{x}+1 \\ \frac{2}{x^2}+x+1 \end{gathered}[/tex]

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