Option A is correct.
In any quadratic equation, to find x, you have to make the equation linear, by taking the square root of both sides as any constant. Once you have completed this step you can use the zero product rule. Thence, Useing the Zero Product Property and set each factor containing a variable equal to zero.
Solve each factor that was set equal to zero by getting the x on one side and the answer on the other side. So, the correct option is A by taking the square root of both sides of the equation.
