Tính giới hạn Lim 2{x^2} - 6x - 8 / x - 4

\[\mathop {\lim }\limits_{x \to 4} \frac{{2{x^2} - 6x - 8}}{{x - 4}}\]\[ = \mathop {\lim }\limits_{x \to 4} \frac{{2\left( {x - 4} \right)\left( {x + 1} \right)}}{{x - 4}}\]\[ = \mathop {\lim }\limits_{x \to 4} 2\left( {x + 1} \right)\]\[ = 2.\left( {4 + 1} \right) = 10\]