x^2+10x-105=-6

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Solution for x^2+10x-105=-6 equation:


Simplifying
x2 + 10x + -105 = -6

Reorder the terms:
-105 + 10x + x2 = -6

Solving
-105 + 10x + x2 = -6

Solving for variable 'x'.

Reorder the terms:
-105 + 6 + 10x + x2 = -6 + 6

Combine like terms: -105 + 6 = -99
-99 + 10x + x2 = -6 + 6

Combine like terms: -6 + 6 = 0
-99 + 10x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '99' to each side of the equation.
-99 + 10x + 99 + x2 = 0 + 99

Reorder the terms:
-99 + 99 + 10x + x2 = 0 + 99

Combine like terms: -99 + 99 = 0
0 + 10x + x2 = 0 + 99
10x + x2 = 0 + 99

Combine like terms: 0 + 99 = 99
10x + x2 = 99

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 = 99 + 25

Reorder the terms:
25 + 10x + x2 = 99 + 25

Combine like terms: 99 + 25 = 124
25 + 10x + x2 = 124

Factor a perfect square on the left side:
(x + 5)(x + 5) = 124

Calculate the square root of the right side: 11.135528726

Break this problem into two subproblems by setting 
(x + 5) equal to 11.135528726 and -11.135528726.

Subproblem 1

x + 5 = 11.135528726 Simplifying x + 5 = 11.135528726 Reorder the terms: 5 + x = 11.135528726 Solving 5 + x = 11.135528726 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 = 11.135528726 + -5 Combine like terms: 5 + -5 = 0 0 + x = 11.135528726 + -5 x = 11.135528726 + -5 Combine like terms: 11.135528726 + -5 = 6.135528726 x = 6.135528726 Simplifying x = 6.135528726

Subproblem 2

x + 5 = -11.135528726 Simplifying x + 5 = -11.135528726 Reorder the terms: 5 + x = -11.135528726 Solving 5 + x = -11.135528726 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 = -11.135528726 + -5 Combine like terms: 5 + -5 = 0 0 + x = -11.135528726 + -5 x = -11.135528726 + -5 Combine like terms: -11.135528726 + -5 = -16.135528726 x = -16.135528726 Simplifying x = -16.135528726

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.135528726, -16.135528726}

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