81x^2-180x+99=0

Solution for 81x^2-180x+99=0 equation:

Simplifying
81x2 + -180x + 99 = 0

Reorder the terms:
99 + -180x + 81x2 = 0

Solving
99 + -180x + 81x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '9'.
9(11 + -20x + 9x2) = 0

Factor a trinomial.
9((1 + -1x)(11 + -9x)) = 0

Ignore the factor 9.
Subproblem 1
Set the factor '(1 + -1x)' equal to zero and attempt to solve:

Simplifying
1 + -1x = 0

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

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

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

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

Simplifying
x = 1
Subproblem 2
Set the factor '(11 + -9x)' equal to zero and attempt to solve:

Simplifying
11 + -9x = 0

Solving
11 + -9x = 0

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

Add '-11' to each side of the equation.
11 + -11 + -9x = 0 + -11

Combine like terms: 11 + -11 = 0
0 + -9x = 0 + -11
-9x = 0 + -11

Combine like terms: 0 + -11 = -11
-9x = -11

Divide each side by '-9'.
x = 1.222222222

Simplifying
x = 1.222222222
Solution
x = {1, 1.222222222}