Find the Degree f(x)=(x^2-4)/(x^2)

$f (x) = \frac{x^{2} - 4}{x^{2}}$

Simplify the numerator.

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Rewrite $4$ as $2^{2}$ .

$\frac{x^{2} - 2^{2}}{x^{2}}$

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = x$ and $b = 2$ .

$\frac{(x + 2) (x - 2)}{x^{2}}$

The degree cannot be determined because $\frac{(x + 2) (x - 2)}{x^{2}}$ is not a polynomial.

Not a polynomial

Find the Degree f(x)=(x^2-4)/(x^2)