-n^2+18n-14=0

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Solution for -n^2+18n-14=0 equation:


Simplifying
-1n2 + 18n + -14 = 0

Reorder the terms:
-14 + 18n + -1n2 = 0

Solving
-14 + 18n + -1n2 = 0

Solving for variable 'n'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
14 + -18n + n2 = 0

Move the constant term to the right:

Add '-14' to each side of the equation.
14 + -18n + -14 + n2 = 0 + -14

Reorder the terms:
14 + -14 + -18n + n2 = 0 + -14

Combine like terms: 14 + -14 = 0
0 + -18n + n2 = 0 + -14
-18n + n2 = 0 + -14

Combine like terms: 0 + -14 = -14
-18n + n2 = -14

The n term is -18n.  Take half its coefficient (-9).
Square it (81) and add it to both sides.

Add '81' to each side of the equation.
-18n + 81 + n2 = -14 + 81

Reorder the terms:
81 + -18n + n2 = -14 + 81

Combine like terms: -14 + 81 = 67
81 + -18n + n2 = 67

Factor a perfect square on the left side:
(n + -9)(n + -9) = 67

Calculate the square root of the right side: 8.185352772

Break this problem into two subproblems by setting 
(n + -9) equal to 8.185352772 and -8.185352772.

Subproblem 1

n + -9 = 8.185352772 Simplifying n + -9 = 8.185352772 Reorder the terms: -9 + n = 8.185352772 Solving -9 + n = 8.185352772 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + n = 8.185352772 + 9 Combine like terms: -9 + 9 = 0 0 + n = 8.185352772 + 9 n = 8.185352772 + 9 Combine like terms: 8.185352772 + 9 = 17.185352772 n = 17.185352772 Simplifying n = 17.185352772

Subproblem 2

n + -9 = -8.185352772 Simplifying n + -9 = -8.185352772 Reorder the terms: -9 + n = -8.185352772 Solving -9 + n = -8.185352772 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + n = -8.185352772 + 9 Combine like terms: -9 + 9 = 0 0 + n = -8.185352772 + 9 n = -8.185352772 + 9 Combine like terms: -8.185352772 + 9 = 0.814647228 n = 0.814647228 Simplifying n = 0.814647228

Solution

The solution to the problem is based on the solutions from the subproblems. n = {17.185352772, 0.814647228}

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