Quadratic Equations - Definition & Examples

Consider the equation $$3x^2 -18 = 0$$

• Naomi claims that $x = \pm2$ are solutions.
• Maryann claims that $x = \pm3$ are solutions.
• Terry claims that $x = \pm3\sqrt{2}$ are solutions.
• Robin claims that $x = \pm\sqrt{6}$ are solutions.