x(2x)(4x+1)=0

Solution for x(2x)(4x+1)=0 equation:

Simplifying
x(2x)(4x + 1) = 0

Remove parenthesis around (2x)
x * 2x(4x + 1) = 0

Reorder the terms:
x * 2x(1 + 4x) = 0

Reorder the terms for easier multiplication:
2x * x(1 + 4x) = 0

Multiply x * x
2x2(1 + 4x) = 0
(1 * 2x2 + 4x * 2x2) = 0
(2x2 + 8x3) = 0

Solving
2x2 + 8x3 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '2x2'.
2x2(1 + 4x) = 0

Ignore the factor 2.
Subproblem 1
Set the factor 'x2' equal to zero and attempt to solve:

Simplifying
x2 = 0

Solving
x2 = 0

Move all terms containing x to the left, all other terms to the right.

Simplifying
x2 = 0

Take the square root of each side:
x = {0}
Subproblem 2
Set the factor '(1 + 4x)' equal to zero and attempt to solve:

Simplifying
1 + 4x = 0

Solving
1 + 4x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-1' to each side of the equation.
1 + -1 + 4x = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 4x = 0 + -1
4x = 0 + -1

Combine like terms: 0 + -1 = -1
4x = -1

Divide each side by '4'.
x = -0.25

Simplifying
x = -0.25
Solution
x = {0, -0.25}