Appendix A - A.5 - The Quadratic Formula and Square Root Properties - Exercises - Page 562: 27

$x = -2.65~~$ or $~~x = 2.65$

We can write the general form of the square roots property: If $x^2 = a$ where $a \geq 0$, then $x = \pm \sqrt{a}$ We can solve the incomplete quadratic equation: $2x^2 = 14$ $x^2 = 7$ $x = \pm \sqrt{7}$ $x = -2.65~~$ or $~~x = 2.65$