4x(x-3)(9x)=0

Solution for 4x(x-3)(9x)=0 equation:

Simplifying
4x(x + -3)(9x) = 0

Reorder the terms:
4x(-3 + x)(9x) = 0

Remove parenthesis around (9x)
4x(-3 + x) * 9x = 0

Reorder the terms for easier multiplication:
4 * 9x * x(-3 + x) = 0

Multiply 4 * 9
36x * x(-3 + x) = 0

Multiply x * x
36x2(-3 + x) = 0
(-3 * 36x2 + x * 36x2) = 0
(-108x2 + 36x3) = 0

Solving
-108x2 + 36x3 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '36x2'.
36x2(-3 + x) = 0

Ignore the factor 36.
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 '(-3 + x)' equal to zero and attempt to solve:

Simplifying
-3 + x = 0

Solving
-3 + x = 0

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

Add '3' to each side of the equation.
-3 + 3 + x = 0 + 3

Combine like terms: -3 + 3 = 0
0 + x = 0 + 3
x = 0 + 3

Combine like terms: 0 + 3 = 3
x = 3

Simplifying
x = 3
Solution
x = {0, 3}