x^2=-10x-19

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Solution for x^2=-10x-19 equation:


Simplifying
x2 = -10x + -19

Reorder the terms:
x2 = -19 + -10x

Solving
x2 = -19 + -10x

Solving for variable 'x'.

Reorder the terms:
19 + 10x + x2 = -19 + -10x + 19 + 10x

Reorder the terms:
19 + 10x + x2 = -19 + 19 + -10x + 10x

Combine like terms: -19 + 19 = 0
19 + 10x + x2 = 0 + -10x + 10x
19 + 10x + x2 = -10x + 10x

Combine like terms: -10x + 10x = 0
19 + 10x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-19' to each side of the equation.
19 + 10x + -19 + x2 = 0 + -19

Reorder the terms:
19 + -19 + 10x + x2 = 0 + -19

Combine like terms: 19 + -19 = 0
0 + 10x + x2 = 0 + -19
10x + x2 = 0 + -19

Combine like terms: 0 + -19 = -19
10x + x2 = -19

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 = -19 + 25

Reorder the terms:
25 + 10x + x2 = -19 + 25

Combine like terms: -19 + 25 = 6
25 + 10x + x2 = 6

Factor a perfect square on the left side:
(x + 5)(x + 5) = 6

Calculate the square root of the right side: 2.449489743

Break this problem into two subproblems by setting 
(x + 5) equal to 2.449489743 and -2.449489743.

Subproblem 1

x + 5 = 2.449489743 Simplifying x + 5 = 2.449489743 Reorder the terms: 5 + x = 2.449489743 Solving 5 + x = 2.449489743 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 = 2.449489743 + -5 Combine like terms: 5 + -5 = 0 0 + x = 2.449489743 + -5 x = 2.449489743 + -5 Combine like terms: 2.449489743 + -5 = -2.550510257 x = -2.550510257 Simplifying x = -2.550510257

Subproblem 2

x + 5 = -2.449489743 Simplifying x + 5 = -2.449489743 Reorder the terms: 5 + x = -2.449489743 Solving 5 + x = -2.449489743 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 = -2.449489743 + -5 Combine like terms: 5 + -5 = 0 0 + x = -2.449489743 + -5 x = -2.449489743 + -5 Combine like terms: -2.449489743 + -5 = -7.449489743 x = -7.449489743 Simplifying x = -7.449489743

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-2.550510257, -7.449489743}

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