22x^2+x-1=0

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Solution for 22x^2+x-1=0 equation:


Simplifying
22x2 + x + -1 = 0

Reorder the terms:
-1 + x + 22x2 = 0

Solving
-1 + x + 22x2 = 0

Solving for variable 'x'.

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

Divide each side by '22'.
-0.04545454545 + 0.04545454545x + x2 = 0

Move the constant term to the right:

Add '0.04545454545' to each side of the equation.
-0.04545454545 + 0.04545454545x + 0.04545454545 + x2 = 0 + 0.04545454545

Reorder the terms:
-0.04545454545 + 0.04545454545 + 0.04545454545x + x2 = 0 + 0.04545454545

Combine like terms: -0.04545454545 + 0.04545454545 = 0.00000000000
0.00000000000 + 0.04545454545x + x2 = 0 + 0.04545454545
0.04545454545x + x2 = 0 + 0.04545454545

Combine like terms: 0 + 0.04545454545 = 0.04545454545
0.04545454545x + x2 = 0.04545454545

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.04545454545x + 0.25 + x2 = 0.04545454545 + 0.25

Reorder the terms:
0.25 + 0.04545454545x + x2 = 0.04545454545 + 0.25

Combine like terms: 0.04545454545 + 0.25 = 0.29545454545
0.25 + 0.04545454545x + x2 = 0.29545454545

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 0.29545454545

Calculate the square root of the right side: 0.543557307

Break this problem into two subproblems by setting 
(x + 0.5) equal to 0.543557307 and -0.543557307.

Subproblem 1

x + 0.5 = 0.543557307 Simplifying x + 0.5 = 0.543557307 Reorder the terms: 0.5 + x = 0.543557307 Solving 0.5 + x = 0.543557307 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 0.543557307 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 0.543557307 + -0.5 x = 0.543557307 + -0.5 Combine like terms: 0.543557307 + -0.5 = 0.043557307 x = 0.043557307 Simplifying x = 0.043557307

Subproblem 2

x + 0.5 = -0.543557307 Simplifying x + 0.5 = -0.543557307 Reorder the terms: 0.5 + x = -0.543557307 Solving 0.5 + x = -0.543557307 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -0.543557307 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -0.543557307 + -0.5 x = -0.543557307 + -0.5 Combine like terms: -0.543557307 + -0.5 = -1.043557307 x = -1.043557307 Simplifying x = -1.043557307

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.043557307, -1.043557307}

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