13x^2+26x-22=0

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Solution for 13x^2+26x-22=0 equation:


Simplifying
13x2 + 26x + -22 = 0

Reorder the terms:
-22 + 26x + 13x2 = 0

Solving
-22 + 26x + 13x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
13 the coefficient of the squared term: 

Divide each side by '13'.
-1.692307692 + 2x + x2 = 0

Move the constant term to the right:

Add '1.692307692' to each side of the equation.
-1.692307692 + 2x + 1.692307692 + x2 = 0 + 1.692307692

Reorder the terms:
-1.692307692 + 1.692307692 + 2x + x2 = 0 + 1.692307692

Combine like terms: -1.692307692 + 1.692307692 = 0.000000000
0.000000000 + 2x + x2 = 0 + 1.692307692
2x + x2 = 0 + 1.692307692

Combine like terms: 0 + 1.692307692 = 1.692307692
2x + x2 = 1.692307692

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 1.692307692 + 1

Reorder the terms:
1 + 2x + x2 = 1.692307692 + 1

Combine like terms: 1.692307692 + 1 = 2.692307692
1 + 2x + x2 = 2.692307692

Factor a perfect square on the left side:
(x + 1)(x + 1) = 2.692307692

Calculate the square root of the right side: 1.640825308

Break this problem into two subproblems by setting 
(x + 1) equal to 1.640825308 and -1.640825308.

Subproblem 1

x + 1 = 1.640825308 Simplifying x + 1 = 1.640825308 Reorder the terms: 1 + x = 1.640825308 Solving 1 + x = 1.640825308 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 1.640825308 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.640825308 + -1 x = 1.640825308 + -1 Combine like terms: 1.640825308 + -1 = 0.640825308 x = 0.640825308 Simplifying x = 0.640825308

Subproblem 2

x + 1 = -1.640825308 Simplifying x + 1 = -1.640825308 Reorder the terms: 1 + x = -1.640825308 Solving 1 + x = -1.640825308 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -1.640825308 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.640825308 + -1 x = -1.640825308 + -1 Combine like terms: -1.640825308 + -1 = -2.640825308 x = -2.640825308 Simplifying x = -2.640825308

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.640825308, -2.640825308}

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