Hi i got problem with solving number 47
My progress: i simplify to x^2-1
So approaching from the left (where $\displaystyle \displaystyle \begin{align*} x < 1 \end{align*}$) your function will be $\displaystyle \displaystyle \begin{align*} \frac{x^2 - 1}{-(x - 1)} \end{align*}$. Simplify and subsitute x = 1 to find the left hand limit.
What do you think you would have to do for the right hand limit?