x^2+x=141

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Solution for x^2+x=141 equation:


Simplifying
x2 + x = 141

Reorder the terms:
x + x2 = 141

Solving
x + x2 = 141

Solving for variable 'x'.

Reorder the terms:
-141 + x + x2 = 141 + -141

Combine like terms: 141 + -141 = 0
-141 + x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '141' to each side of the equation.
-141 + x + 141 + x2 = 0 + 141

Reorder the terms:
-141 + 141 + x + x2 = 0 + 141

Combine like terms: -141 + 141 = 0
0 + x + x2 = 0 + 141
x + x2 = 0 + 141

Combine like terms: 0 + 141 = 141
x + x2 = 141

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 = 141 + 0.25

Reorder the terms:
0.25 + x + x2 = 141 + 0.25

Combine like terms: 141 + 0.25 = 141.25
0.25 + x + x2 = 141.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 141.25

Calculate the square root of the right side: 11.884864324

Break this problem into two subproblems by setting 
(x + 0.5) equal to 11.884864324 and -11.884864324.

Subproblem 1

x + 0.5 = 11.884864324 Simplifying x + 0.5 = 11.884864324 Reorder the terms: 0.5 + x = 11.884864324 Solving 0.5 + x = 11.884864324 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 = 11.884864324 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 11.884864324 + -0.5 x = 11.884864324 + -0.5 Combine like terms: 11.884864324 + -0.5 = 11.384864324 x = 11.384864324 Simplifying x = 11.384864324

Subproblem 2

x + 0.5 = -11.884864324 Simplifying x + 0.5 = -11.884864324 Reorder the terms: 0.5 + x = -11.884864324 Solving 0.5 + x = -11.884864324 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 = -11.884864324 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -11.884864324 + -0.5 x = -11.884864324 + -0.5 Combine like terms: -11.884864324 + -0.5 = -12.384864324 x = -12.384864324 Simplifying x = -12.384864324

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.384864324, -12.384864324}

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