84x^2-164x-8=0

Solution for 84x^2-164x-8=0 equation:

Simplifying
84x2 + -164x + -8 = 0

Reorder the terms:
-8 + -164x + 84x2 = 0

Solving
-8 + -164x + 84x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '4'.
4(-2 + -41x + 21x2) = 0

Factor a trinomial.
4((-1 + -21x)(2 + -1x)) = 0

Ignore the factor 4.
Subproblem 1
Set the factor '(-1 + -21x)' equal to zero and attempt to solve:

Simplifying
-1 + -21x = 0

Solving
-1 + -21x = 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 + -21x = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -21x = 0 + 1
-21x = 0 + 1

Combine like terms: 0 + 1 = 1
-21x = 1

Divide each side by '-21'.
x = -0.04761904762

Simplifying
x = -0.04761904762
Subproblem 2
Set the factor '(2 + -1x)' equal to zero and attempt to solve:

Simplifying
2 + -1x = 0

Solving
2 + -1x = 0

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

Add '-2' to each side of the equation.
2 + -2 + -1x = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -1x = 0 + -2
-1x = 0 + -2

Combine like terms: 0 + -2 = -2
-1x = -2

Divide each side by '-1'.
x = 2

Simplifying
x = 2
Solution
x = {-0.04761904762, 2}