26x-x^2=108

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Solution for 26x-x^2=108 equation:


Simplifying
26x + -1x2 = 108

Solving
26x + -1x2 = 108

Solving for variable 'x'.

Reorder the terms:
-108 + 26x + -1x2 = 108 + -108

Combine like terms: 108 + -108 = 0
-108 + 26x + -1x2 = 0

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

Divide each side by '-1'.
108 + -26x + x2 = 0

Move the constant term to the right:

Add '-108' to each side of the equation.
108 + -26x + -108 + x2 = 0 + -108

Reorder the terms:
108 + -108 + -26x + x2 = 0 + -108

Combine like terms: 108 + -108 = 0
0 + -26x + x2 = 0 + -108
-26x + x2 = 0 + -108

Combine like terms: 0 + -108 = -108
-26x + x2 = -108

The x term is -26x.  Take half its coefficient (-13).
Square it (169) and add it to both sides.

Add '169' to each side of the equation.
-26x + 169 + x2 = -108 + 169

Reorder the terms:
169 + -26x + x2 = -108 + 169

Combine like terms: -108 + 169 = 61
169 + -26x + x2 = 61

Factor a perfect square on the left side:
(x + -13)(x + -13) = 61

Calculate the square root of the right side: 7.810249676

Break this problem into two subproblems by setting 
(x + -13) equal to 7.810249676 and -7.810249676.

Subproblem 1

x + -13 = 7.810249676 Simplifying x + -13 = 7.810249676 Reorder the terms: -13 + x = 7.810249676 Solving -13 + x = 7.810249676 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + x = 7.810249676 + 13 Combine like terms: -13 + 13 = 0 0 + x = 7.810249676 + 13 x = 7.810249676 + 13 Combine like terms: 7.810249676 + 13 = 20.810249676 x = 20.810249676 Simplifying x = 20.810249676

Subproblem 2

x + -13 = -7.810249676 Simplifying x + -13 = -7.810249676 Reorder the terms: -13 + x = -7.810249676 Solving -13 + x = -7.810249676 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + x = -7.810249676 + 13 Combine like terms: -13 + 13 = 0 0 + x = -7.810249676 + 13 x = -7.810249676 + 13 Combine like terms: -7.810249676 + 13 = 5.189750324 x = 5.189750324 Simplifying x = 5.189750324

Solution

The solution to the problem is based on the solutions from the subproblems. x = {20.810249676, 5.189750324}

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