Solve for x:

2 (x - 5) (2 x + 1) = 0

Divide both sides by 2:

(x - 5) (2 x + 1) = 0

Split into two equations:

x - 5 = 0 or 2 x + 1 = 0

Add 5 to both sides:

x = 5 or 2 x + 1 = 0

Subtract 1 from both sides:

x = 5 or 2 x = -1

Divide both sides by 2:

**Answer: |x = 5 or x = -1/2**