You seem to have misunderstood the purpose of this board. Show us whatyouhave tried and where you have problems and we will attempt to assist you and give hints.

I will say this much- problems 4 and 5 do NOT ask you to solve the equation. They only ask you to show that a given functionisa solution. If you were given the equation , and asked to show that x= 2 is a solution, you would NOT attempt to solve the equation- just replace x with the number "2" and see if it works.