(9x-1)(3x+9)=0

Solution for (9x-1)(3x+9)=0 equation:

Simplifying
(9x + -1)(3x + 9) = 0

Reorder the terms:
(-1 + 9x)(3x + 9) = 0

Reorder the terms:
(-1 + 9x)(9 + 3x) = 0

Multiply (-1 + 9x) * (9 + 3x)
(-1(9 + 3x) + 9x * (9 + 3x)) = 0
((9 * -1 + 3x * -1) + 9x * (9 + 3x)) = 0
((-9 + -3x) + 9x * (9 + 3x)) = 0
(-9 + -3x + (9 * 9x + 3x * 9x)) = 0
(-9 + -3x + (81x + 27x2)) = 0

Combine like terms: -3x + 81x = 78x
(-9 + 78x + 27x2) = 0

Solving
-9 + 78x + 27x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3'.
3(-3 + 26x + 9x2) = 0

Factor a trinomial.
3((-3 + -1x)(1 + -9x)) = 0

Ignore the factor 3.
Subproblem 1
Set the factor '(-3 + -1x)' equal to zero and attempt to solve:

Simplifying
-3 + -1x = 0

Solving
-3 + -1x = 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 + -1x = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -1x = 0 + 3
-1x = 0 + 3

Combine like terms: 0 + 3 = 3
-1x = 3

Divide each side by '-1'.
x = -3

Simplifying
x = -3
Subproblem 2
Set the factor '(1 + -9x)' equal to zero and attempt to solve:

Simplifying
1 + -9x = 0

Solving
1 + -9x = 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 + -9x = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -9x = 0 + -1
-9x = 0 + -1

Combine like terms: 0 + -1 = -1
-9x = -1

Divide each side by '-9'.
x = 0.1111111111

Simplifying
x = 0.1111111111
Solution
x = {-3, 0.1111111111}