To solve the equation x² – 2 = 0, we first rearrange it to isolate x²:
x² = 2
Next, we take the square root of both sides. Remember that taking the square root can yield both positive and negative solutions:
x = ±√2
Thus, the solutions are x = √2 and x = -√2. To express these solutions in roster form, we list both values within curly braces:
The solution set in roster form is: {√2, -√2}