x^2+10x-5=-8

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Solution for x^2+10x-5=-8 equation:


Simplifying
x2 + 10x + -5 = -8

Reorder the terms:
-5 + 10x + x2 = -8

Solving
-5 + 10x + x2 = -8

Solving for variable 'x'.

Reorder the terms:
-5 + 8 + 10x + x2 = -8 + 8

Combine like terms: -5 + 8 = 3
3 + 10x + x2 = -8 + 8

Combine like terms: -8 + 8 = 0
3 + 10x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + 10x + -3 + x2 = 0 + -3

Reorder the terms:
3 + -3 + 10x + x2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 10x + x2 = 0 + -3
10x + x2 = 0 + -3

Combine like terms: 0 + -3 = -3
10x + x2 = -3

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 = -3 + 25

Reorder the terms:
25 + 10x + x2 = -3 + 25

Combine like terms: -3 + 25 = 22
25 + 10x + x2 = 22

Factor a perfect square on the left side:
(x + 5)(x + 5) = 22

Calculate the square root of the right side: 4.69041576

Break this problem into two subproblems by setting 
(x + 5) equal to 4.69041576 and -4.69041576.

Subproblem 1

x + 5 = 4.69041576 Simplifying x + 5 = 4.69041576 Reorder the terms: 5 + x = 4.69041576 Solving 5 + x = 4.69041576 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 = 4.69041576 + -5 Combine like terms: 5 + -5 = 0 0 + x = 4.69041576 + -5 x = 4.69041576 + -5 Combine like terms: 4.69041576 + -5 = -0.30958424 x = -0.30958424 Simplifying x = -0.30958424

Subproblem 2

x + 5 = -4.69041576 Simplifying x + 5 = -4.69041576 Reorder the terms: 5 + x = -4.69041576 Solving 5 + x = -4.69041576 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 = -4.69041576 + -5 Combine like terms: 5 + -5 = 0 0 + x = -4.69041576 + -5 x = -4.69041576 + -5 Combine like terms: -4.69041576 + -5 = -9.69041576 x = -9.69041576 Simplifying x = -9.69041576

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.30958424, -9.69041576}

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