## Elementary Algebra

The text states that every positive real number does indeed have two square roots; one is positive and the other is negative. They are opposites of each other. We illustrate this rule using an example. For example, $\sqrt 4$ has two roots, $2$ and $-2$. Both $2$ and $-2$, when raised to the power of $2$, result in $4$. Therefore, the question statement is true.