11n^2=-9n+5

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Solution for 11n^2=-9n+5 equation:


Simplifying
11n2 = -9n + 5

Reorder the terms:
11n2 = 5 + -9n

Solving
11n2 = 5 + -9n

Solving for variable 'n'.

Reorder the terms:
-5 + 9n + 11n2 = 5 + -9n + -5 + 9n

Reorder the terms:
-5 + 9n + 11n2 = 5 + -5 + -9n + 9n

Combine like terms: 5 + -5 = 0
-5 + 9n + 11n2 = 0 + -9n + 9n
-5 + 9n + 11n2 = -9n + 9n

Combine like terms: -9n + 9n = 0
-5 + 9n + 11n2 = 0

Begin completing the square.  Divide all terms by
11 the coefficient of the squared term: 

Divide each side by '11'.
-0.4545454545 + 0.8181818182n + n2 = 0

Move the constant term to the right:

Add '0.4545454545' to each side of the equation.
-0.4545454545 + 0.8181818182n + 0.4545454545 + n2 = 0 + 0.4545454545

Reorder the terms:
-0.4545454545 + 0.4545454545 + 0.8181818182n + n2 = 0 + 0.4545454545

Combine like terms: -0.4545454545 + 0.4545454545 = 0.0000000000
0.0000000000 + 0.8181818182n + n2 = 0 + 0.4545454545
0.8181818182n + n2 = 0 + 0.4545454545

Combine like terms: 0 + 0.4545454545 = 0.4545454545
0.8181818182n + n2 = 0.4545454545

The n term is 0.8181818182n.  Take half its coefficient (0.4090909091).
Square it (0.1673553719) and add it to both sides.

Add '0.1673553719' to each side of the equation.
0.8181818182n + 0.1673553719 + n2 = 0.4545454545 + 0.1673553719

Reorder the terms:
0.1673553719 + 0.8181818182n + n2 = 0.4545454545 + 0.1673553719

Combine like terms: 0.4545454545 + 0.1673553719 = 0.6219008264
0.1673553719 + 0.8181818182n + n2 = 0.6219008264

Factor a perfect square on the left side:
(n + 0.4090909091)(n + 0.4090909091) = 0.6219008264

Calculate the square root of the right side: 0.78860689

Break this problem into two subproblems by setting 
(n + 0.4090909091) equal to 0.78860689 and -0.78860689.

Subproblem 1

n + 0.4090909091 = 0.78860689 Simplifying n + 0.4090909091 = 0.78860689 Reorder the terms: 0.4090909091 + n = 0.78860689 Solving 0.4090909091 + n = 0.78860689 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.4090909091' to each side of the equation. 0.4090909091 + -0.4090909091 + n = 0.78860689 + -0.4090909091 Combine like terms: 0.4090909091 + -0.4090909091 = 0.0000000000 0.0000000000 + n = 0.78860689 + -0.4090909091 n = 0.78860689 + -0.4090909091 Combine like terms: 0.78860689 + -0.4090909091 = 0.3795159809 n = 0.3795159809 Simplifying n = 0.3795159809

Subproblem 2

n + 0.4090909091 = -0.78860689 Simplifying n + 0.4090909091 = -0.78860689 Reorder the terms: 0.4090909091 + n = -0.78860689 Solving 0.4090909091 + n = -0.78860689 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.4090909091' to each side of the equation. 0.4090909091 + -0.4090909091 + n = -0.78860689 + -0.4090909091 Combine like terms: 0.4090909091 + -0.4090909091 = 0.0000000000 0.0000000000 + n = -0.78860689 + -0.4090909091 n = -0.78860689 + -0.4090909091 Combine like terms: -0.78860689 + -0.4090909091 = -1.1976977991 n = -1.1976977991 Simplifying n = -1.1976977991

Solution

The solution to the problem is based on the solutions from the subproblems. n = {0.3795159809, -1.1976977991}

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