12u^2-u-1=0

Solution for 12u^2-u-1=0 equation:

Simplifying
12u2 + -1u + -1 = 0

Reorder the terms:
-1 + -1u + 12u2 = 0

Solving
-1 + -1u + 12u2 = 0

Solving for variable 'u'.

Factor a trinomial.
(-1 + -4u)(1 + -3u) = 0

Subproblem 1
Set the factor '(-1 + -4u)' equal to zero and attempt to solve:

Simplifying
-1 + -4u = 0

Solving
-1 + -4u = 0

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

Add '1' to each side of the equation.
-1 + 1 + -4u = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -4u = 0 + 1
-4u = 0 + 1

Combine like terms: 0 + 1 = 1
-4u = 1

Divide each side by '-4'.
u = -0.25

Simplifying
u = -0.25
Subproblem 2
Set the factor '(1 + -3u)' equal to zero and attempt to solve:

Simplifying
1 + -3u = 0

Solving
1 + -3u = 0

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

Add '-1' to each side of the equation.
1 + -1 + -3u = 0 + -1

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

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

Divide each side by '-3'.
u = 0.3333333333

Simplifying
u = 0.3333333333
Solution
u = {-0.25, 0.3333333333}