x^2+10x=-1

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Solution for x^2+10x=-1 equation:


Simplifying
x2 + 10x = -1

Reorder the terms:
10x + x2 = -1

Solving
10x + x2 = -1

Solving for variable 'x'.

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

Combine like terms: -1 + 1 = 0
1 + 10x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + 10x + -1 + x2 = 0 + -1

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

Combine like terms: 1 + -1 = 0
0 + 10x + x2 = 0 + -1
10x + x2 = 0 + -1

Combine like terms: 0 + -1 = -1
10x + x2 = -1

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 = -1 + 25

Reorder the terms:
25 + 10x + x2 = -1 + 25

Combine like terms: -1 + 25 = 24
25 + 10x + x2 = 24

Factor a perfect square on the left side:
(x + 5)(x + 5) = 24

Calculate the square root of the right side: 4.898979486

Break this problem into two subproblems by setting 
(x + 5) equal to 4.898979486 and -4.898979486.

Subproblem 1

x + 5 = 4.898979486 Simplifying x + 5 = 4.898979486 Reorder the terms: 5 + x = 4.898979486 Solving 5 + x = 4.898979486 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 = 4.898979486 + -5 Combine like terms: 5 + -5 = 0 0 + x = 4.898979486 + -5 x = 4.898979486 + -5 Combine like terms: 4.898979486 + -5 = -0.101020514 x = -0.101020514 Simplifying x = -0.101020514

Subproblem 2

x + 5 = -4.898979486 Simplifying x + 5 = -4.898979486 Reorder the terms: 5 + x = -4.898979486 Solving 5 + x = -4.898979486 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 = -4.898979486 + -5 Combine like terms: 5 + -5 = 0 0 + x = -4.898979486 + -5 x = -4.898979486 + -5 Combine like terms: -4.898979486 + -5 = -9.898979486 x = -9.898979486 Simplifying x = -9.898979486

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.101020514, -9.898979486}

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