Answer:
x = 4 or x = -4
Step-by-step explanation:
Solve for x over the real numbers:
x^2/4 - 4 = 0
The left hand side factors into a product with three terms:
1/4 (x - 4) (x + 4) = 0
Multiply both sides by 4:
(x - 4) (x + 4) = 0
Split into two equations:
x - 4 = 0 or x + 4 = 0
Add 4 to both sides:
x = 4 or x + 4 = 0
Subtract 4 from both sides:
Answer: |
| x = 4 or x = -4
