9v^2-8v-1=0

Solution for 9v^2-8v-1=0 equation:

Simplifying
9v2 + -8v + -1 = 0

Reorder the terms:
-1 + -8v + 9v2 = 0

Solving
-1 + -8v + 9v2 = 0

Solving for variable 'v'.

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

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

Simplifying
-1 + -9v = 0

Solving
-1 + -9v = 0

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

Add '1' to each side of the equation.
-1 + 1 + -9v = 0 + 1

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

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

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

Simplifying
v = -0.1111111111
Subproblem 2
Set the factor '(1 + -1v)' equal to zero and attempt to solve:

Simplifying
1 + -1v = 0

Solving
1 + -1v = 0

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

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

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

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

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

Simplifying
v = 1
Solution
v = {-0.1111111111, 1}