If the given expression is a polynomial, find its degree.
$\frac{21 x}{3 x} + 2$

The expression is not a polynomial and hence does not have a degree.

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Solution

The correct option is D 0
$\frac{21 x}{3 x} + 2$
Simplifying the above expression,
$\frac{21 x}{3 x} + 2$
$= \frac{21 \times x}{3 \times x} + 2$
$= \frac{3 \times 7 \times x}{3 \times x} + 2$
$= 7 + 2$
$= 9$
$9$ can be rewritten as $9 x^{0} \Rightarrow$ Degree $= 0$ .

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