Who can help me for find this question?

Question

Who can help me for find this question?

---

Answer 1

√(m+2)-√m=12

(√(m+2)-√m)*(√(m+2)+√m)=12*(√(m+2)+√m)

√(m+2)²-(√m)²=12*(√m+2)+√m)

m+2-m=12*(√(m+2)+√m)

2=12*(√(m+2)+√m)  |÷12

√(m+2)+√m=1/6.

Ответ: A).