Question

Which of the following are not polynomials?A. {x? +x+1B. x2 + x +1C. x2 + 2x+1D. 3+x+1E. 2 + 2x + 1

Answer 1

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

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