x=x^2+7-143

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Solution for x=x^2+7-143 equation:


Simplifying
x = x2 + 7 + -143

Reorder the terms:
x = 7 + -143 + x2

Combine like terms: 7 + -143 = -136
x = -136 + x2

Solving
x = -136 + x2

Solving for variable 'x'.

Reorder the terms:
136 + x + -1x2 = -136 + x2 + 136 + -1x2

Reorder the terms:
136 + x + -1x2 = -136 + 136 + x2 + -1x2

Combine like terms: -136 + 136 = 0
136 + x + -1x2 = 0 + x2 + -1x2
136 + x + -1x2 = x2 + -1x2

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

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-136 + -1x + x2 = 0

Move the constant term to the right:

Add '136' to each side of the equation.
-136 + -1x + 136 + x2 = 0 + 136

Reorder the terms:
-136 + 136 + -1x + x2 = 0 + 136

Combine like terms: -136 + 136 = 0
0 + -1x + x2 = 0 + 136
-1x + x2 = 0 + 136

Combine like terms: 0 + 136 = 136
-1x + x2 = 136

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.
-1x + 0.25 + x2 = 136 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 136 + 0.25

Combine like terms: 136 + 0.25 = 136.25
0.25 + -1x + x2 = 136.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 136.25

Calculate the square root of the right side: 11.67261753

Break this problem into two subproblems by setting 
(x + 0.5) equal to 11.67261753 and -11.67261753.

Subproblem 1

x + 0.5 = 11.67261753 Simplifying x + 0.5 = 11.67261753 Reorder the terms: 0.5 + x = 11.67261753 Solving 0.5 + x = 11.67261753 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 = 11.67261753 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 11.67261753 + -0.5 x = 11.67261753 + -0.5 Combine like terms: 11.67261753 + -0.5 = 11.17261753 x = 11.17261753 Simplifying x = 11.17261753

Subproblem 2

x + 0.5 = -11.67261753 Simplifying x + 0.5 = -11.67261753 Reorder the terms: 0.5 + x = -11.67261753 Solving 0.5 + x = -11.67261753 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 = -11.67261753 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -11.67261753 + -0.5 x = -11.67261753 + -0.5 Combine like terms: -11.67261753 + -0.5 = -12.17261753 x = -12.17261753 Simplifying x = -12.17261753

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.17261753, -12.17261753}

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