n^2+2n-9.2416=0

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Solution for n^2+2n-9.2416=0 equation:


Simplifying
n2 + 2n + -9.2416 = 0

Reorder the terms:
-9.2416 + 2n + n2 = 0

Solving
-9.2416 + 2n + n2 = 0

Solving for variable 'n'.

Begin completing the square.

Move the constant term to the right:

Add '9.2416' to each side of the equation.
-9.2416 + 2n + 9.2416 + n2 = 0 + 9.2416

Reorder the terms:
-9.2416 + 9.2416 + 2n + n2 = 0 + 9.2416

Combine like terms: -9.2416 + 9.2416 = 0.0000
0.0000 + 2n + n2 = 0 + 9.2416
2n + n2 = 0 + 9.2416

Combine like terms: 0 + 9.2416 = 9.2416
2n + n2 = 9.2416

The n term is 2n.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2n + 1 + n2 = 9.2416 + 1

Reorder the terms:
1 + 2n + n2 = 9.2416 + 1

Combine like terms: 9.2416 + 1 = 10.2416
1 + 2n + n2 = 10.2416

Factor a perfect square on the left side:
(n + 1)(n + 1) = 10.2416

Calculate the square root of the right side: 3.20024999

Break this problem into two subproblems by setting 
(n + 1) equal to 3.20024999 and -3.20024999.

Subproblem 1

n + 1 = 3.20024999 Simplifying n + 1 = 3.20024999 Reorder the terms: 1 + n = 3.20024999 Solving 1 + n = 3.20024999 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + n = 3.20024999 + -1 Combine like terms: 1 + -1 = 0 0 + n = 3.20024999 + -1 n = 3.20024999 + -1 Combine like terms: 3.20024999 + -1 = 2.20024999 n = 2.20024999 Simplifying n = 2.20024999

Subproblem 2

n + 1 = -3.20024999 Simplifying n + 1 = -3.20024999 Reorder the terms: 1 + n = -3.20024999 Solving 1 + n = -3.20024999 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + n = -3.20024999 + -1 Combine like terms: 1 + -1 = 0 0 + n = -3.20024999 + -1 n = -3.20024999 + -1 Combine like terms: -3.20024999 + -1 = -4.20024999 n = -4.20024999 Simplifying n = -4.20024999

Solution

The solution to the problem is based on the solutions from the subproblems. n = {2.20024999, -4.20024999}

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