x^2-10x=125

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Solution for x^2-10x=125 equation:


Simplifying
x2 + -10x = 125

Reorder the terms:
-10x + x2 = 125

Solving
-10x + x2 = 125

Solving for variable 'x'.

Reorder the terms:
-125 + -10x + x2 = 125 + -125

Combine like terms: 125 + -125 = 0
-125 + -10x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '125' to each side of the equation.
-125 + -10x + 125 + x2 = 0 + 125

Reorder the terms:
-125 + 125 + -10x + x2 = 0 + 125

Combine like terms: -125 + 125 = 0
0 + -10x + x2 = 0 + 125
-10x + x2 = 0 + 125

Combine like terms: 0 + 125 = 125
-10x + x2 = 125

The x term is -10x.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10x + 25 + x2 = 125 + 25

Reorder the terms:
25 + -10x + x2 = 125 + 25

Combine like terms: 125 + 25 = 150
25 + -10x + x2 = 150

Factor a perfect square on the left side:
(x + -5)(x + -5) = 150

Calculate the square root of the right side: 12.247448714

Break this problem into two subproblems by setting 
(x + -5) equal to 12.247448714 and -12.247448714.

Subproblem 1

x + -5 = 12.247448714 Simplifying x + -5 = 12.247448714 Reorder the terms: -5 + x = 12.247448714 Solving -5 + x = 12.247448714 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = 12.247448714 + 5 Combine like terms: -5 + 5 = 0 0 + x = 12.247448714 + 5 x = 12.247448714 + 5 Combine like terms: 12.247448714 + 5 = 17.247448714 x = 17.247448714 Simplifying x = 17.247448714

Subproblem 2

x + -5 = -12.247448714 Simplifying x + -5 = -12.247448714 Reorder the terms: -5 + x = -12.247448714 Solving -5 + x = -12.247448714 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = -12.247448714 + 5 Combine like terms: -5 + 5 = 0 0 + x = -12.247448714 + 5 x = -12.247448714 + 5 Combine like terms: -12.247448714 + 5 = -7.247448714 x = -7.247448714 Simplifying x = -7.247448714

Solution

The solution to the problem is based on the solutions from the subproblems. x = {17.247448714, -7.247448714}

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