x^2+8=x+100

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Solution for x^2+8=x+100 equation:


Simplifying
x2 + 8 = x + 100

Reorder the terms:
8 + x2 = x + 100

Reorder the terms:
8 + x2 = 100 + x

Solving
8 + x2 = 100 + x

Solving for variable 'x'.

Reorder the terms:
8 + -100 + -1x + x2 = 100 + x + -100 + -1x

Combine like terms: 8 + -100 = -92
-92 + -1x + x2 = 100 + x + -100 + -1x

Reorder the terms:
-92 + -1x + x2 = 100 + -100 + x + -1x

Combine like terms: 100 + -100 = 0
-92 + -1x + x2 = 0 + x + -1x
-92 + -1x + x2 = x + -1x

Combine like terms: x + -1x = 0
-92 + -1x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '92' to each side of the equation.
-92 + -1x + 92 + x2 = 0 + 92

Reorder the terms:
-92 + 92 + -1x + x2 = 0 + 92

Combine like terms: -92 + 92 = 0
0 + -1x + x2 = 0 + 92
-1x + x2 = 0 + 92

Combine like terms: 0 + 92 = 92
-1x + x2 = 92

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 = 92 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 92 + 0.25

Combine like terms: 92 + 0.25 = 92.25
0.25 + -1x + x2 = 92.25

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 92.25

Calculate the square root of the right side: 9.604686356

Break this problem into two subproblems by setting 
(x + -0.5) equal to 9.604686356 and -9.604686356.

Subproblem 1

x + -0.5 = 9.604686356 Simplifying x + -0.5 = 9.604686356 Reorder the terms: -0.5 + x = 9.604686356 Solving -0.5 + x = 9.604686356 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 = 9.604686356 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 9.604686356 + 0.5 x = 9.604686356 + 0.5 Combine like terms: 9.604686356 + 0.5 = 10.104686356 x = 10.104686356 Simplifying x = 10.104686356

Subproblem 2

x + -0.5 = -9.604686356 Simplifying x + -0.5 = -9.604686356 Reorder the terms: -0.5 + x = -9.604686356 Solving -0.5 + x = -9.604686356 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 = -9.604686356 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -9.604686356 + 0.5 x = -9.604686356 + 0.5 Combine like terms: -9.604686356 + 0.5 = -9.104686356 x = -9.104686356 Simplifying x = -9.104686356

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.104686356, -9.104686356}

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