-11n^2+8n+22=12

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Solution for -11n^2+8n+22=12 equation:


Simplifying
-11n2 + 8n + 22 = 12

Reorder the terms:
22 + 8n + -11n2 = 12

Solving
22 + 8n + -11n2 = 12

Solving for variable 'n'.

Reorder the terms:
22 + -12 + 8n + -11n2 = 12 + -12

Combine like terms: 22 + -12 = 10
10 + 8n + -11n2 = 12 + -12

Combine like terms: 12 + -12 = 0
10 + 8n + -11n2 = 0

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

Divide each side by '-11'.
-0.9090909091 + -0.7272727273n + n2 = 0

Move the constant term to the right:

Add '0.9090909091' to each side of the equation.
-0.9090909091 + -0.7272727273n + 0.9090909091 + n2 = 0 + 0.9090909091

Reorder the terms:
-0.9090909091 + 0.9090909091 + -0.7272727273n + n2 = 0 + 0.9090909091

Combine like terms: -0.9090909091 + 0.9090909091 = 0.0000000000
0.0000000000 + -0.7272727273n + n2 = 0 + 0.9090909091
-0.7272727273n + n2 = 0 + 0.9090909091

Combine like terms: 0 + 0.9090909091 = 0.9090909091
-0.7272727273n + n2 = 0.9090909091

The n term is -0.7272727273n.  Take half its coefficient (-0.3636363637).
Square it (0.1322314050) and add it to both sides.

Add '0.1322314050' to each side of the equation.
-0.7272727273n + 0.1322314050 + n2 = 0.9090909091 + 0.1322314050

Reorder the terms:
0.1322314050 + -0.7272727273n + n2 = 0.9090909091 + 0.1322314050

Combine like terms: 0.9090909091 + 0.1322314050 = 1.0413223141
0.1322314050 + -0.7272727273n + n2 = 1.0413223141

Factor a perfect square on the left side:
(n + -0.3636363637)(n + -0.3636363637) = 1.0413223141

Calculate the square root of the right side: 1.020452015

Break this problem into two subproblems by setting 
(n + -0.3636363637) equal to 1.020452015 and -1.020452015.

Subproblem 1

n + -0.3636363637 = 1.020452015 Simplifying n + -0.3636363637 = 1.020452015 Reorder the terms: -0.3636363637 + n = 1.020452015 Solving -0.3636363637 + n = 1.020452015 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.3636363637' to each side of the equation. -0.3636363637 + 0.3636363637 + n = 1.020452015 + 0.3636363637 Combine like terms: -0.3636363637 + 0.3636363637 = 0.0000000000 0.0000000000 + n = 1.020452015 + 0.3636363637 n = 1.020452015 + 0.3636363637 Combine like terms: 1.020452015 + 0.3636363637 = 1.3840883787 n = 1.3840883787 Simplifying n = 1.3840883787

Subproblem 2

n + -0.3636363637 = -1.020452015 Simplifying n + -0.3636363637 = -1.020452015 Reorder the terms: -0.3636363637 + n = -1.020452015 Solving -0.3636363637 + n = -1.020452015 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.3636363637' to each side of the equation. -0.3636363637 + 0.3636363637 + n = -1.020452015 + 0.3636363637 Combine like terms: -0.3636363637 + 0.3636363637 = 0.0000000000 0.0000000000 + n = -1.020452015 + 0.3636363637 n = -1.020452015 + 0.3636363637 Combine like terms: -1.020452015 + 0.3636363637 = -0.6568156513 n = -0.6568156513 Simplifying n = -0.6568156513

Solution

The solution to the problem is based on the solutions from the subproblems. n = {1.3840883787, -0.6568156513}

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