3x^2-6x-5=139

Solution for 3x^2-6x-5=139 equation:

Simplifying
3x2 + -6x + -5 = 139

Reorder the terms:
-5 + -6x + 3x2 = 139

Solving
-5 + -6x + 3x2 = 139

Solving for variable 'x'.

Reorder the terms:
-5 + -139 + -6x + 3x2 = 139 + -139

Combine like terms: -5 + -139 = -144
-144 + -6x + 3x2 = 139 + -139

Combine like terms: 139 + -139 = 0
-144 + -6x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-48 + -2x + x2) = 0

Factor a trinomial.
3((-6 + -1x)(8 + -1x)) = 0

Ignore the factor 3.
Subproblem 1
Set the factor '(-6 + -1x)' equal to zero and attempt to solve:

Simplifying
-6 + -1x = 0

Solving
-6 + -1x = 0

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

Add '6' to each side of the equation.
-6 + 6 + -1x = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -1x = 0 + 6
-1x = 0 + 6

Combine like terms: 0 + 6 = 6
-1x = 6

Divide each side by '-1'.
x = -6

Simplifying
x = -6
Subproblem 2
Set the factor '(8 + -1x)' equal to zero and attempt to solve:

Simplifying
8 + -1x = 0

Solving
8 + -1x = 0

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

Add '-8' to each side of the equation.
8 + -8 + -1x = 0 + -8

Combine like terms: 8 + -8 = 0
0 + -1x = 0 + -8
-1x = 0 + -8

Combine like terms: 0 + -8 = -8
-1x = -8

Divide each side by '-1'.
x = 8

Simplifying
x = 8
Solution
x = {-6, 8}