x^2-10x=-10

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


Simplifying
x2 + -10x = -10

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

Solving
-10x + x2 = -10

Solving for variable 'x'.

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

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

Begin completing the square.

Move the constant term to the right:

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

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

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

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

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 = -10 + 25

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

Combine like terms: -10 + 25 = 15
25 + -10x + x2 = 15

Factor a perfect square on the left side:
(x + -5)(x + -5) = 15

Calculate the square root of the right side: 3.872983346

Break this problem into two subproblems by setting 
(x + -5) equal to 3.872983346 and -3.872983346.

Subproblem 1

x + -5 = 3.872983346 Simplifying x + -5 = 3.872983346 Reorder the terms: -5 + x = 3.872983346 Solving -5 + x = 3.872983346 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 = 3.872983346 + 5 Combine like terms: -5 + 5 = 0 0 + x = 3.872983346 + 5 x = 3.872983346 + 5 Combine like terms: 3.872983346 + 5 = 8.872983346 x = 8.872983346 Simplifying x = 8.872983346

Subproblem 2

x + -5 = -3.872983346 Simplifying x + -5 = -3.872983346 Reorder the terms: -5 + x = -3.872983346 Solving -5 + x = -3.872983346 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 = -3.872983346 + 5 Combine like terms: -5 + 5 = 0 0 + x = -3.872983346 + 5 x = -3.872983346 + 5 Combine like terms: -3.872983346 + 5 = 1.127016654 x = 1.127016654 Simplifying x = 1.127016654

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.872983346, 1.127016654}

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