x^2-125x=25

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Solution for x^2-125x=25 equation:


Simplifying
x2 + -125x = 25

Reorder the terms:
-125x + x2 = 25

Solving
-125x + x2 = 25

Solving for variable 'x'.

Reorder the terms:
-25 + -125x + x2 = 25 + -25

Combine like terms: 25 + -25 = 0
-25 + -125x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '25' to each side of the equation.
-25 + -125x + 25 + x2 = 0 + 25

Reorder the terms:
-25 + 25 + -125x + x2 = 0 + 25

Combine like terms: -25 + 25 = 0
0 + -125x + x2 = 0 + 25
-125x + x2 = 0 + 25

Combine like terms: 0 + 25 = 25
-125x + x2 = 25

The x term is -125x.  Take half its coefficient (-62.5).
Square it (3906.25) and add it to both sides.

Add '3906.25' to each side of the equation.
-125x + 3906.25 + x2 = 25 + 3906.25

Reorder the terms:
3906.25 + -125x + x2 = 25 + 3906.25

Combine like terms: 25 + 3906.25 = 3931.25
3906.25 + -125x + x2 = 3931.25

Factor a perfect square on the left side:
(x + -62.5)(x + -62.5) = 3931.25

Calculate the square root of the right side: 62.69968102

Break this problem into two subproblems by setting 
(x + -62.5) equal to 62.69968102 and -62.69968102.

Subproblem 1

x + -62.5 = 62.69968102 Simplifying x + -62.5 = 62.69968102 Reorder the terms: -62.5 + x = 62.69968102 Solving -62.5 + x = 62.69968102 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '62.5' to each side of the equation. -62.5 + 62.5 + x = 62.69968102 + 62.5 Combine like terms: -62.5 + 62.5 = 0.0 0.0 + x = 62.69968102 + 62.5 x = 62.69968102 + 62.5 Combine like terms: 62.69968102 + 62.5 = 125.19968102 x = 125.19968102 Simplifying x = 125.19968102

Subproblem 2

x + -62.5 = -62.69968102 Simplifying x + -62.5 = -62.69968102 Reorder the terms: -62.5 + x = -62.69968102 Solving -62.5 + x = -62.69968102 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '62.5' to each side of the equation. -62.5 + 62.5 + x = -62.69968102 + 62.5 Combine like terms: -62.5 + 62.5 = 0.0 0.0 + x = -62.69968102 + 62.5 x = -62.69968102 + 62.5 Combine like terms: -62.69968102 + 62.5 = -0.19968102 x = -0.19968102 Simplifying x = -0.19968102

Solution

The solution to the problem is based on the solutions from the subproblems. x = {125.19968102, -0.19968102}

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