Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$\displaystyle\lim_{ x \rightarrow -1 } \left( \frac{ { x }^{ 2 } -1 }{ x+1 } \right)$$

Evaluate

$-2$

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