Question

√(x+4)-√(x-36)=400 how would I find x?

Answer 1

You can either square both sides(which is tedious in my opinion) or add (root (x-36)) to the right side and square both sides like that. I feel that that way is easier because less radicals on one side is just... easier...

Remember to use the formula \[(a+b)^{2}=(a ^{2}+2ab+b ^{2})\]
It'll make life easier.