Actually for this one you don't need to simplify it first. You can plug x = 8 in directly. Always try this first and see if there is a Mathematical problem in doing so. Then you know if you have to try to simplify it.
Actually for this one you don't need to simplify it first. You can plug x = 8 in directly. Always try this first and see if there is a Mathematical problem in doing so. Then you know if you have to try to simplify it.
-Dan
I suspect the OP has made a typo and it's x --> -8 rather than 8.