x(25-x)=25

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Solution for x(25-x)=25 equation:


Simplifying
x(25 + -1x) = 25
(25 * x + -1x * x) = 25
(25x + -1x2) = 25

Solving
25x + -1x2 = 25

Solving for variable 'x'.

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

Combine like terms: 25 + -25 = 0
-25 + 25x + -1x2 = 0

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

Divide each side by '-1'.
25 + -25x + x2 = 0

Move the constant term to the right:

Add '-25' to each side of the equation.
25 + -25x + -25 + x2 = 0 + -25

Reorder the terms:
25 + -25 + -25x + x2 = 0 + -25

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

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

The x term is -25x.  Take half its coefficient (-12.5).
Square it (156.25) and add it to both sides.

Add '156.25' to each side of the equation.
-25x + 156.25 + x2 = -25 + 156.25

Reorder the terms:
156.25 + -25x + x2 = -25 + 156.25

Combine like terms: -25 + 156.25 = 131.25
156.25 + -25x + x2 = 131.25

Factor a perfect square on the left side:
(x + -12.5)(x + -12.5) = 131.25

Calculate the square root of the right side: 11.456439237

Break this problem into two subproblems by setting 
(x + -12.5) equal to 11.456439237 and -11.456439237.

Subproblem 1

x + -12.5 = 11.456439237 Simplifying x + -12.5 = 11.456439237 Reorder the terms: -12.5 + x = 11.456439237 Solving -12.5 + x = 11.456439237 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12.5' to each side of the equation. -12.5 + 12.5 + x = 11.456439237 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = 11.456439237 + 12.5 x = 11.456439237 + 12.5 Combine like terms: 11.456439237 + 12.5 = 23.956439237 x = 23.956439237 Simplifying x = 23.956439237

Subproblem 2

x + -12.5 = -11.456439237 Simplifying x + -12.5 = -11.456439237 Reorder the terms: -12.5 + x = -11.456439237 Solving -12.5 + x = -11.456439237 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12.5' to each side of the equation. -12.5 + 12.5 + x = -11.456439237 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = -11.456439237 + 12.5 x = -11.456439237 + 12.5 Combine like terms: -11.456439237 + 12.5 = 1.043560763 x = 1.043560763 Simplifying x = 1.043560763

Solution

The solution to the problem is based on the solutions from the subproblems. x = {23.956439237, 1.043560763}

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