n^2+10n-2=-8

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Solution for n^2+10n-2=-8 equation:


Simplifying
n2 + 10n + -2 = -8

Reorder the terms:
-2 + 10n + n2 = -8

Solving
-2 + 10n + n2 = -8

Solving for variable 'n'.

Reorder the terms:
-2 + 8 + 10n + n2 = -8 + 8

Combine like terms: -2 + 8 = 6
6 + 10n + n2 = -8 + 8

Combine like terms: -8 + 8 = 0
6 + 10n + n2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-6' to each side of the equation.
6 + 10n + -6 + n2 = 0 + -6

Reorder the terms:
6 + -6 + 10n + n2 = 0 + -6

Combine like terms: 6 + -6 = 0
0 + 10n + n2 = 0 + -6
10n + n2 = 0 + -6

Combine like terms: 0 + -6 = -6
10n + n2 = -6

The n term is 10n.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10n + 25 + n2 = -6 + 25

Reorder the terms:
25 + 10n + n2 = -6 + 25

Combine like terms: -6 + 25 = 19
25 + 10n + n2 = 19

Factor a perfect square on the left side:
(n + 5)(n + 5) = 19

Calculate the square root of the right side: 4.358898944

Break this problem into two subproblems by setting 
(n + 5) equal to 4.358898944 and -4.358898944.

Subproblem 1

n + 5 = 4.358898944 Simplifying n + 5 = 4.358898944 Reorder the terms: 5 + n = 4.358898944 Solving 5 + n = 4.358898944 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + n = 4.358898944 + -5 Combine like terms: 5 + -5 = 0 0 + n = 4.358898944 + -5 n = 4.358898944 + -5 Combine like terms: 4.358898944 + -5 = -0.641101056 n = -0.641101056 Simplifying n = -0.641101056

Subproblem 2

n + 5 = -4.358898944 Simplifying n + 5 = -4.358898944 Reorder the terms: 5 + n = -4.358898944 Solving 5 + n = -4.358898944 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + n = -4.358898944 + -5 Combine like terms: 5 + -5 = 0 0 + n = -4.358898944 + -5 n = -4.358898944 + -5 Combine like terms: -4.358898944 + -5 = -9.358898944 n = -9.358898944 Simplifying n = -9.358898944

Solution

The solution to the problem is based on the solutions from the subproblems. n = {-0.641101056, -9.358898944}

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