next time , do not post so many questions in one thread . Its against the rules of the forum . Post one or two , then try to solve the rest and come back if you are really lost .
I will show you a few , then u try out the rest . OK ?
The properties of absolute value tells us that |x|>a , then x>a , x<-a
so here .. try continue here
then the other case would be .. this is complex so we can just ignore .
square both sides ..
square both sides
Then square again ..
carry on here .