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{{ printedBook.courseTrack.name }} {{ printedBook.name }} Taking the square root of both sides in an equation is way of solving some quadratic equations. 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 $x=±4.$