Y = √ x + 1 ×√ X-1, y = √ X & # 178; - 1 is equal function? Why?

Y = √ x + 1 ×√ X-1, y = √ X & # 178; - 1 is equal function? Why?

I don't want to wait. They have different domains
The first domain is x > 1
The second domain is x > 1 or X < - 1
I hope I can help you,