I have two equations:
- $x = \sqrt{16}$
- $x^2 = 16$
In first case I think there will be two value of $x = \pm4$. Because $(-4) \cdot (-4) =( +4) \cdot(+4) = 16$
In the second case I am confused. It can also have two values i.e $\pm 4$.
But somewhere I read that one of the equations returns only one value and it will be $+4$. I can't find which one will return $+4$ and which one both values and the reason behind it. Can any body help me please? Thanks.