What is the square root property?

The square root property states that if ( x^2 = a ), where ( a ) is a non-negative real number, then ( x ) can be expressed as ( x = \sqrt{a} ) or ( x = -\sqrt{a} ). This means that a quadratic equation can be solved by taking the square root of both sides, yielding two possible solutions. It is particularly useful in solving equations of the form ( x^2 = k ).