x*x+x=143

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Solution for x*x+x=143 equation:


Simplifying
x * x + x = 143

Multiply x * x
x2 + x = 143

Reorder the terms:
x + x2 = 143

Solving
x + x2 = 143

Solving for variable 'x'.

Reorder the terms:
-143 + x + x2 = 143 + -143

Combine like terms: 143 + -143 = 0
-143 + x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '143' to each side of the equation.
-143 + x + 143 + x2 = 0 + 143

Reorder the terms:
-143 + 143 + x + x2 = 0 + 143

Combine like terms: -143 + 143 = 0
0 + x + x2 = 0 + 143
x + x2 = 0 + 143

Combine like terms: 0 + 143 = 143
x + x2 = 143

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 = 143 + 0.25

Reorder the terms:
0.25 + x + x2 = 143 + 0.25

Combine like terms: 143 + 0.25 = 143.25
0.25 + x + x2 = 143.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 143.25

Calculate the square root of the right side: 11.968709204

Break this problem into two subproblems by setting 
(x + 0.5) equal to 11.968709204 and -11.968709204.

Subproblem 1

x + 0.5 = 11.968709204 Simplifying x + 0.5 = 11.968709204 Reorder the terms: 0.5 + x = 11.968709204 Solving 0.5 + x = 11.968709204 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 = 11.968709204 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 11.968709204 + -0.5 x = 11.968709204 + -0.5 Combine like terms: 11.968709204 + -0.5 = 11.468709204 x = 11.468709204 Simplifying x = 11.468709204

Subproblem 2

x + 0.5 = -11.968709204 Simplifying x + 0.5 = -11.968709204 Reorder the terms: 0.5 + x = -11.968709204 Solving 0.5 + x = -11.968709204 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 = -11.968709204 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -11.968709204 + -0.5 x = -11.968709204 + -0.5 Combine like terms: -11.968709204 + -0.5 = -12.468709204 x = -12.468709204 Simplifying x = -12.468709204

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.468709204, -12.468709204}

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