n^2-27n+168=0

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Solution for n^2-27n+168=0 equation:


Simplifying
n2 + -27n + 168 = 0

Reorder the terms:
168 + -27n + n2 = 0

Solving
168 + -27n + n2 = 0

Solving for variable 'n'.

Begin completing the square.

Move the constant term to the right:

Add '-168' to each side of the equation.
168 + -27n + -168 + n2 = 0 + -168

Reorder the terms:
168 + -168 + -27n + n2 = 0 + -168

Combine like terms: 168 + -168 = 0
0 + -27n + n2 = 0 + -168
-27n + n2 = 0 + -168

Combine like terms: 0 + -168 = -168
-27n + n2 = -168

The n term is -27n.  Take half its coefficient (-13.5).
Square it (182.25) and add it to both sides.

Add '182.25' to each side of the equation.
-27n + 182.25 + n2 = -168 + 182.25

Reorder the terms:
182.25 + -27n + n2 = -168 + 182.25

Combine like terms: -168 + 182.25 = 14.25
182.25 + -27n + n2 = 14.25

Factor a perfect square on the left side:
(n + -13.5)(n + -13.5) = 14.25

Calculate the square root of the right side: 3.774917218

Break this problem into two subproblems by setting 
(n + -13.5) equal to 3.774917218 and -3.774917218.

Subproblem 1

n + -13.5 = 3.774917218 Simplifying n + -13.5 = 3.774917218 Reorder the terms: -13.5 + n = 3.774917218 Solving -13.5 + n = 3.774917218 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '13.5' to each side of the equation. -13.5 + 13.5 + n = 3.774917218 + 13.5 Combine like terms: -13.5 + 13.5 = 0.0 0.0 + n = 3.774917218 + 13.5 n = 3.774917218 + 13.5 Combine like terms: 3.774917218 + 13.5 = 17.274917218 n = 17.274917218 Simplifying n = 17.274917218

Subproblem 2

n + -13.5 = -3.774917218 Simplifying n + -13.5 = -3.774917218 Reorder the terms: -13.5 + n = -3.774917218 Solving -13.5 + n = -3.774917218 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '13.5' to each side of the equation. -13.5 + 13.5 + n = -3.774917218 + 13.5 Combine like terms: -13.5 + 13.5 = 0.0 0.0 + n = -3.774917218 + 13.5 n = -3.774917218 + 13.5 Combine like terms: -3.774917218 + 13.5 = 9.725082782 n = 9.725082782 Simplifying n = 9.725082782

Solution

The solution to the problem is based on the solutions from the subproblems. n = {17.274917218, 9.725082782}

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