Why does the value of root 6 have no negative number, only positive number, but the square root of 6 has negative number?

Why does the value of root 6 have no negative number, only positive number, but the square root of 6 has negative number?

I see what you mean. Root 6 is a positive number, negative root 6 is a negative number, so the value of root 6 is a positive number. And the square root of 6 is a positive and negative root 6, so it has a negative number