Answer:
x = ±2√3
Step-by-step explanation:
Step 1: Write equation
x² - 7 = 5
Step 2: Solve for x
Add 7 to both sides: x² = 12
Square root both sides: x = ±√12
Simplify: x = ±2√3
Step 3: Check
Plug in x to verify if it's a solution.
(2√3)² - 7 = 5
4(3) - 7 = 5
12 - 7 = 5
5 = 5
(-2√3)² - 7 = 5
4(3) - 7 = 5
12 - 7 = 5
5 = 5
