Which of the following expressions are polynomials in one variable and which are not $?$ State reason for your answer. If the given expression is a polynomial, state whether it is a polynomial in one variable or not

$\pi x^{2}-\sqrt{3} x+11$

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Given expression $\pi x^{2}-\sqrt{3} x+11$ is a polynomial because the exponent of variable $x$ in each of its terms is an integer, viz., $2,1$ and $0$ respectively. The given polynomial is a polynomial in one variable $x$.

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