x^2+(5-x)(5-x)=26

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Solution for x^2+(5-x)(5-x)=26 equation:


Simplifying
x2 + (5 + -1x)(5 + -1x) = 26

Multiply (5 + -1x) * (5 + -1x)
x2 + (5(5 + -1x) + -1x * (5 + -1x)) = 26
x2 + ((5 * 5 + -1x * 5) + -1x * (5 + -1x)) = 26
x2 + ((25 + -5x) + -1x * (5 + -1x)) = 26
x2 + (25 + -5x + (5 * -1x + -1x * -1x)) = 26
x2 + (25 + -5x + (-5x + 1x2)) = 26

Combine like terms: -5x + -5x = -10x
x2 + (25 + -10x + 1x2) = 26

Reorder the terms:
25 + -10x + x2 + 1x2 = 26

Combine like terms: x2 + 1x2 = 2x2
25 + -10x + 2x2 = 26

Solving
25 + -10x + 2x2 = 26

Solving for variable 'x'.

Reorder the terms:
25 + -26 + -10x + 2x2 = 26 + -26

Combine like terms: 25 + -26 = -1
-1 + -10x + 2x2 = 26 + -26

Combine like terms: 26 + -26 = 0
-1 + -10x + 2x2 = 0

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

Divide each side by '2'.
-0.5 + -5x + x2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -5x + 0.5 + x2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -5x + x2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -5x + x2 = 0 + 0.5
-5x + x2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-5x + x2 = 0.5

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = 0.5 + 6.25

Reorder the terms:
6.25 + -5x + x2 = 0.5 + 6.25

Combine like terms: 0.5 + 6.25 = 6.75
6.25 + -5x + x2 = 6.75

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 6.75

Calculate the square root of the right side: 2.598076211

Break this problem into two subproblems by setting 
(x + -2.5) equal to 2.598076211 and -2.598076211.

Subproblem 1

x + -2.5 = 2.598076211 Simplifying x + -2.5 = 2.598076211 Reorder the terms: -2.5 + x = 2.598076211 Solving -2.5 + x = 2.598076211 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 2.598076211 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 2.598076211 + 2.5 x = 2.598076211 + 2.5 Combine like terms: 2.598076211 + 2.5 = 5.098076211 x = 5.098076211 Simplifying x = 5.098076211

Subproblem 2

x + -2.5 = -2.598076211 Simplifying x + -2.5 = -2.598076211 Reorder the terms: -2.5 + x = -2.598076211 Solving -2.5 + x = -2.598076211 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -2.598076211 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -2.598076211 + 2.5 x = -2.598076211 + 2.5 Combine like terms: -2.598076211 + 2.5 = -0.098076211 x = -0.098076211 Simplifying x = -0.098076211

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.098076211, -0.098076211}

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