Vertical asymptotes of a rational function occur at the values of $x$ where the denominator equals zero while the numerator is non-zero:
$$\text{Denominator} = x^2 - 4 = 0$$ $$(x - 2)(x + 2) = 0 \implies x = 2 \text{ or } x = -2$$Since the numerator is a constant $-8 \ne 0$, both lines $x = 2$ and $x = -2$ ($x = \pm 2$) are vertical asymptotes.
परिमेय फलन के ऊर्ध्वाधर अनंतस्पर्शी (vertical asymptotes) हर के शून्य होने पर प्राप्त होते हैं (जबकि अंश अशून्य हो):
$$x^2 - 4 = 0 \implies x^2 = 4 \implies x = \pm 2$$