Rational fractions are defined on Wikipedia as "an algebraic fraction such that both the numerator and denominator are polynomials", or [math]f(x) = \frac {P(x)} {Q(x)}[/math] How is it then that [math]\frac {3} {x-3}[/math] is considered a rational fraction? 3 is not a polynomial, nor is x-3. Is it that P(x) is equal to 3, but P(x) itself is a polynomial? I'm not sure I just don't understand it, or either I'm making a mistake in my understanding of polynomials.
Thanks in advance for any help.
Thanks in advance for any help.