99x^2-22x-121=0

Solution for 99x^2-22x-121=0 equation:

Simplifying
99x2 + -22x + -121 = 0

Reorder the terms:
-121 + -22x + 99x2 = 0

Solving
-121 + -22x + 99x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '11'.
11(-11 + -2x + 9x2) = 0

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

Ignore the factor 11.
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}