Nilai lim x-> 1 x⁴-1/x²-1

[tex]lim x-> 1 \: \frac{( {x}^{2} - 1)( {x}^{2} + 1)}{ {x}^{2} - 1} [/tex]
*x^2 - 1 dicoret*
[tex] {1}^{2} + 1 = 2[/tex]