give the conjurate pair of the given factor by filling the blank.

example:2√3-1 ➡️ 2√3+1


1.√5+3. √5___
2.3√7-√2. ___+√2
3.5√x+3√y. ____3√y
4.2√7-5. 2√7____
5.7+5√3. ____+5√3​