5.1-5.1x=x^2

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Solution for 5.1-5.1x=x^2 equation:


Simplifying
5.1 + -5.1x = x2

Solving
5.1 + -5.1x = x2

Solving for variable 'x'.

Combine like terms: x2 + -1x2 = 0
5.1 + -5.1x + -1x2 = 0

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

Divide each side by '-1'.
-5.1 + 5.1x + x2 = 0

Move the constant term to the right:

Add '5.1' to each side of the equation.
-5.1 + 5.1x + 5.1 + x2 = 0 + 5.1

Reorder the terms:
-5.1 + 5.1 + 5.1x + x2 = 0 + 5.1

Combine like terms: -5.1 + 5.1 = 0.0
0.0 + 5.1x + x2 = 0 + 5.1
5.1x + x2 = 0 + 5.1

Combine like terms: 0 + 5.1 = 5.1
5.1x + x2 = 5.1

The x term is 5.1x.  Take half its coefficient (2.55).
Square it (6.5025) and add it to both sides.

Add '6.5025' to each side of the equation.
5.1x + 6.5025 + x2 = 5.1 + 6.5025

Reorder the terms:
6.5025 + 5.1x + x2 = 5.1 + 6.5025

Combine like terms: 5.1 + 6.5025 = 11.6025
6.5025 + 5.1x + x2 = 11.6025

Factor a perfect square on the left side:
(x + 2.55)(x + 2.55) = 11.6025

Calculate the square root of the right side: 3.406244266

Break this problem into two subproblems by setting 
(x + 2.55) equal to 3.406244266 and -3.406244266.

Subproblem 1

x + 2.55 = 3.406244266 Simplifying x + 2.55 = 3.406244266 Reorder the terms: 2.55 + x = 3.406244266 Solving 2.55 + x = 3.406244266 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.55' to each side of the equation. 2.55 + -2.55 + x = 3.406244266 + -2.55 Combine like terms: 2.55 + -2.55 = 0.00 0.00 + x = 3.406244266 + -2.55 x = 3.406244266 + -2.55 Combine like terms: 3.406244266 + -2.55 = 0.856244266 x = 0.856244266 Simplifying x = 0.856244266

Subproblem 2

x + 2.55 = -3.406244266 Simplifying x + 2.55 = -3.406244266 Reorder the terms: 2.55 + x = -3.406244266 Solving 2.55 + x = -3.406244266 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.55' to each side of the equation. 2.55 + -2.55 + x = -3.406244266 + -2.55 Combine like terms: 2.55 + -2.55 = 0.00 0.00 + x = -3.406244266 + -2.55 x = -3.406244266 + -2.55 Combine like terms: -3.406244266 + -2.55 = -5.956244266 x = -5.956244266 Simplifying x = -5.956244266

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.856244266, -5.956244266}

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