x^2-x-181=0

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Solution for x^2-x-181=0 equation:


Simplifying
x2 + -1x + -181 = 0

Reorder the terms:
-181 + -1x + x2 = 0

Solving
-181 + -1x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '181' to each side of the equation.
-181 + -1x + 181 + x2 = 0 + 181

Reorder the terms:
-181 + 181 + -1x + x2 = 0 + 181

Combine like terms: -181 + 181 = 0
0 + -1x + x2 = 0 + 181
-1x + x2 = 0 + 181

Combine like terms: 0 + 181 = 181
-1x + x2 = 181

The x term is -1x.  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.
-1x + 0.25 + x2 = 181 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 181 + 0.25

Combine like terms: 181 + 0.25 = 181.25
0.25 + -1x + x2 = 181.25

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 181.25

Calculate the square root of the right side: 13.462912018

Break this problem into two subproblems by setting 
(x + -0.5) equal to 13.462912018 and -13.462912018.

Subproblem 1

x + -0.5 = 13.462912018 Simplifying x + -0.5 = 13.462912018 Reorder the terms: -0.5 + x = 13.462912018 Solving -0.5 + x = 13.462912018 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 = 13.462912018 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 13.462912018 + 0.5 x = 13.462912018 + 0.5 Combine like terms: 13.462912018 + 0.5 = 13.962912018 x = 13.962912018 Simplifying x = 13.962912018

Subproblem 2

x + -0.5 = -13.462912018 Simplifying x + -0.5 = -13.462912018 Reorder the terms: -0.5 + x = -13.462912018 Solving -0.5 + x = -13.462912018 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 = -13.462912018 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -13.462912018 + 0.5 x = -13.462912018 + 0.5 Combine like terms: -13.462912018 + 0.5 = -12.962912018 x = -12.962912018 Simplifying x = -12.962912018

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.962912018, -12.962912018}

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