Taking the square root of both sides in an equation is way of solving some . This method gives

**two solutions**, a negative and a positive. For example, the equation

$x_{2}=16$ has the solutions

$x=-4$ and

$x=4$ since

$(-4)_{2}=16and4_{2}=16.$

However, when solving an equation this way, don't forget to

**add the negative solution** by adding

$±$ to the solution. The solutions can be written as

$x=±4.$