Question

what are the solution(s) of (x^2 - 4 = 0)?

• (x = -4) or (x = 4)
• (x = -2) or (x = 2)
• (x = 2)
• (x = 4)

Explanation:

Step1: Write down the equation

$$x^2 - 4 = 0$$

Step2: Add 4 to both sides

$$x^2 = 4$$

Step3: Take the square root of both sides

$$x = \pm\sqrt{4}$$

Step4: Simplify the square root

$$x = -2\text{ or }x = 2$$

Answer:

\(x = -2\text{ or }x = 2\)