x^2+x^2=25x+25

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Solution for x^2+x^2=25x+25 equation:


Simplifying
x2 + x2 = 25x + 25

Combine like terms: x2 + x2 = 2x2
2x2 = 25x + 25

Reorder the terms:
2x2 = 25 + 25x

Solving
2x2 = 25 + 25x

Solving for variable 'x'.

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

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

Combine like terms: 25 + -25 = 0
-25 + -25x + 2x2 = 0 + 25x + -25x
-25 + -25x + 2x2 = 25x + -25x

Combine like terms: 25x + -25x = 0
-25 + -25x + 2x2 = 0

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

Divide each side by '2'.
-12.5 + -12.5x + x2 = 0

Move the constant term to the right:

Add '12.5' to each side of the equation.
-12.5 + -12.5x + 12.5 + x2 = 0 + 12.5

Reorder the terms:
-12.5 + 12.5 + -12.5x + x2 = 0 + 12.5

Combine like terms: -12.5 + 12.5 = 0.0
0.0 + -12.5x + x2 = 0 + 12.5
-12.5x + x2 = 0 + 12.5

Combine like terms: 0 + 12.5 = 12.5
-12.5x + x2 = 12.5

The x term is -12.5x.  Take half its coefficient (-6.25).
Square it (39.0625) and add it to both sides.

Add '39.0625' to each side of the equation.
-12.5x + 39.0625 + x2 = 12.5 + 39.0625

Reorder the terms:
39.0625 + -12.5x + x2 = 12.5 + 39.0625

Combine like terms: 12.5 + 39.0625 = 51.5625
39.0625 + -12.5x + x2 = 51.5625

Factor a perfect square on the left side:
(x + -6.25)(x + -6.25) = 51.5625

Calculate the square root of the right side: 7.180703308

Break this problem into two subproblems by setting 
(x + -6.25) equal to 7.180703308 and -7.180703308.

Subproblem 1

x + -6.25 = 7.180703308 Simplifying x + -6.25 = 7.180703308 Reorder the terms: -6.25 + x = 7.180703308 Solving -6.25 + x = 7.180703308 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.25' to each side of the equation. -6.25 + 6.25 + x = 7.180703308 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + x = 7.180703308 + 6.25 x = 7.180703308 + 6.25 Combine like terms: 7.180703308 + 6.25 = 13.430703308 x = 13.430703308 Simplifying x = 13.430703308

Subproblem 2

x + -6.25 = -7.180703308 Simplifying x + -6.25 = -7.180703308 Reorder the terms: -6.25 + x = -7.180703308 Solving -6.25 + x = -7.180703308 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.25' to each side of the equation. -6.25 + 6.25 + x = -7.180703308 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + x = -7.180703308 + 6.25 x = -7.180703308 + 6.25 Combine like terms: -7.180703308 + 6.25 = -0.930703308 x = -0.930703308 Simplifying x = -0.930703308

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.430703308, -0.930703308}

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