MCQ
A polynominal in the following is:
  • A
    $7{\text{x}}^2-5\sqrt{\text{x}}​+5​$
  • ${\text{t}}^3-2{\text{t}}+1$
  • C
    $\text{x}^2-\dfrac{1}{\text{x}^2}$
  • D
    $\sqrt{\text{y}}+5\text{y}-1$

Answer

Correct option: B.
${\text{t}}^3-2{\text{t}}+1$

Degree of variables in ploynomials $(1), (3)$ and $(4)$ are not whole numbers.
$\therefore$ they are not ploynomials. While in option $(2)$ degrees of variable are whole numbers.
$\therefore$ it is a ploynomial.

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