x^2+22x-8=0

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Solution for x^2+22x-8=0 equation:


Simplifying
x2 + 22x + -8 = 0

Reorder the terms:
-8 + 22x + x2 = 0

Solving
-8 + 22x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '8' to each side of the equation.
-8 + 22x + 8 + x2 = 0 + 8

Reorder the terms:
-8 + 8 + 22x + x2 = 0 + 8

Combine like terms: -8 + 8 = 0
0 + 22x + x2 = 0 + 8
22x + x2 = 0 + 8

Combine like terms: 0 + 8 = 8
22x + x2 = 8

The x term is 22x.  Take half its coefficient (11).
Square it (121) and add it to both sides.

Add '121' to each side of the equation.
22x + 121 + x2 = 8 + 121

Reorder the terms:
121 + 22x + x2 = 8 + 121

Combine like terms: 8 + 121 = 129
121 + 22x + x2 = 129

Factor a perfect square on the left side:
(x + 11)(x + 11) = 129

Calculate the square root of the right side: 11.357816692

Break this problem into two subproblems by setting 
(x + 11) equal to 11.357816692 and -11.357816692.

Subproblem 1

x + 11 = 11.357816692 Simplifying x + 11 = 11.357816692 Reorder the terms: 11 + x = 11.357816692 Solving 11 + x = 11.357816692 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + x = 11.357816692 + -11 Combine like terms: 11 + -11 = 0 0 + x = 11.357816692 + -11 x = 11.357816692 + -11 Combine like terms: 11.357816692 + -11 = 0.357816692 x = 0.357816692 Simplifying x = 0.357816692

Subproblem 2

x + 11 = -11.357816692 Simplifying x + 11 = -11.357816692 Reorder the terms: 11 + x = -11.357816692 Solving 11 + x = -11.357816692 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + x = -11.357816692 + -11 Combine like terms: 11 + -11 = 0 0 + x = -11.357816692 + -11 x = -11.357816692 + -11 Combine like terms: -11.357816692 + -11 = -22.357816692 x = -22.357816692 Simplifying x = -22.357816692

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.357816692, -22.357816692}

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