8 - sqrt(3) is indeed the conjugate of 8 + sqrt(3).
What are you asking here? You are to "evaluate or simplify" what?
You should first fully understand what an equivalent expression is. This type of expression is an equation that are the same, even though they might look a little different at first glance. When you try to substitute a value to the expression, they will result in the same value at the end.
Happy Studying!
yes I know but will not give answer because you have not say that