-x^2-10x+10=0

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Solution for -x^2-10x+10=0 equation:


Simplifying
-1x2 + -10x + 10 = 0

Reorder the terms:
10 + -10x + -1x2 = 0

Solving
10 + -10x + -1x2 = 0

Solving for variable 'x'.

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

Divide each side by '-1'.
-10 + 10x + x2 = 0

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 = 35
25 + 10x + x2 = 35

Factor a perfect square on the left side:
(x + 5)(x + 5) = 35

Calculate the square root of the right side: 5.916079783

Break this problem into two subproblems by setting 
(x + 5) equal to 5.916079783 and -5.916079783.

Subproblem 1

x + 5 = 5.916079783 Simplifying x + 5 = 5.916079783 Reorder the terms: 5 + x = 5.916079783 Solving 5 + x = 5.916079783 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 = 5.916079783 + -5 Combine like terms: 5 + -5 = 0 0 + x = 5.916079783 + -5 x = 5.916079783 + -5 Combine like terms: 5.916079783 + -5 = 0.916079783 x = 0.916079783 Simplifying x = 0.916079783

Subproblem 2

x + 5 = -5.916079783 Simplifying x + 5 = -5.916079783 Reorder the terms: 5 + x = -5.916079783 Solving 5 + x = -5.916079783 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 = -5.916079783 + -5 Combine like terms: 5 + -5 = 0 0 + x = -5.916079783 + -5 x = -5.916079783 + -5 Combine like terms: -5.916079783 + -5 = -10.916079783 x = -10.916079783 Simplifying x = -10.916079783

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.916079783, -10.916079783}

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