7x^2-14x-13=8

Solution for 7x^2-14x-13=8 equation:

Simplifying
7x2 + -14x + -13 = 8

Reorder the terms:
-13 + -14x + 7x2 = 8

Solving
-13 + -14x + 7x2 = 8

Solving for variable 'x'.

Reorder the terms:
-13 + -8 + -14x + 7x2 = 8 + -8

Combine like terms: -13 + -8 = -21
-21 + -14x + 7x2 = 8 + -8

Combine like terms: 8 + -8 = 0
-21 + -14x + 7x2 = 0

Factor out the Greatest Common Factor (GCF), '7'.
7(-3 + -2x + x2) = 0

Factor a trinomial.
7((-1 + -1x)(3 + -1x)) = 0

Ignore the factor 7.
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 '(3 + -1x)' equal to zero and attempt to solve:

Simplifying
3 + -1x = 0

Solving
3 + -1x = 0

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

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

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

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

Divide each side by '-1'.
x = 3

Simplifying
x = 3
Solution
x = {-1, 3}