x^2+x=3.55555556

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Solution for x^2+x=3.55555556 equation:


Simplifying
x2 + x = 3.55555556

Reorder the terms:
x + x2 = 3.55555556

Solving
x + x2 = 3.55555556

Solving for variable 'x'.

Reorder the terms:
-3.55555556 + x + x2 = 3.55555556 + -3.55555556

Combine like terms: 3.55555556 + -3.55555556 = 0.00000000
-3.55555556 + x + x2 = 0.00000000

Begin completing the square.

Move the constant term to the right:

Add '3.55555556' to each side of the equation.
-3.55555556 + x + 3.55555556 + x2 = 0.00000000 + 3.55555556

Reorder the terms:
-3.55555556 + 3.55555556 + x + x2 = 0.00000000 + 3.55555556

Combine like terms: -3.55555556 + 3.55555556 = 0.00000000
0.00000000 + x + x2 = 0.00000000 + 3.55555556
x + x2 = 0.00000000 + 3.55555556

Combine like terms: 0.00000000 + 3.55555556 = 3.55555556
x + x2 = 3.55555556

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.
x + 0.25 + x2 = 3.55555556 + 0.25

Reorder the terms:
0.25 + x + x2 = 3.55555556 + 0.25

Combine like terms: 3.55555556 + 0.25 = 3.80555556
0.25 + x + x2 = 3.80555556

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 3.80555556

Calculate the square root of the right side: 1.95078332

Break this problem into two subproblems by setting 
(x + 0.5) equal to 1.95078332 and -1.95078332.

Subproblem 1

x + 0.5 = 1.95078332 Simplifying x + 0.5 = 1.95078332 Reorder the terms: 0.5 + x = 1.95078332 Solving 0.5 + x = 1.95078332 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 = 1.95078332 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 1.95078332 + -0.5 x = 1.95078332 + -0.5 Combine like terms: 1.95078332 + -0.5 = 1.45078332 x = 1.45078332 Simplifying x = 1.45078332

Subproblem 2

x + 0.5 = -1.95078332 Simplifying x + 0.5 = -1.95078332 Reorder the terms: 0.5 + x = -1.95078332 Solving 0.5 + x = -1.95078332 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 = -1.95078332 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -1.95078332 + -0.5 x = -1.95078332 + -0.5 Combine like terms: -1.95078332 + -0.5 = -2.45078332 x = -2.45078332 Simplifying x = -2.45078332

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.45078332, -2.45078332}

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