n^2+72n+36=0

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Solution for n^2+72n+36=0 equation:


Simplifying
n2 + 72n + 36 = 0

Reorder the terms:
36 + 72n + n2 = 0

Solving
36 + 72n + n2 = 0

Solving for variable 'n'.

Begin completing the square.

Move the constant term to the right:

Add '-36' to each side of the equation.
36 + 72n + -36 + n2 = 0 + -36

Reorder the terms:
36 + -36 + 72n + n2 = 0 + -36

Combine like terms: 36 + -36 = 0
0 + 72n + n2 = 0 + -36
72n + n2 = 0 + -36

Combine like terms: 0 + -36 = -36
72n + n2 = -36

The n term is 72n.  Take half its coefficient (36).
Square it (1296) and add it to both sides.

Add '1296' to each side of the equation.
72n + 1296 + n2 = -36 + 1296

Reorder the terms:
1296 + 72n + n2 = -36 + 1296

Combine like terms: -36 + 1296 = 1260
1296 + 72n + n2 = 1260

Factor a perfect square on the left side:
(n + 36)(n + 36) = 1260

Calculate the square root of the right side: 35.496478699

Break this problem into two subproblems by setting 
(n + 36) equal to 35.496478699 and -35.496478699.

Subproblem 1

n + 36 = 35.496478699 Simplifying n + 36 = 35.496478699 Reorder the terms: 36 + n = 35.496478699 Solving 36 + n = 35.496478699 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-36' to each side of the equation. 36 + -36 + n = 35.496478699 + -36 Combine like terms: 36 + -36 = 0 0 + n = 35.496478699 + -36 n = 35.496478699 + -36 Combine like terms: 35.496478699 + -36 = -0.503521301 n = -0.503521301 Simplifying n = -0.503521301

Subproblem 2

n + 36 = -35.496478699 Simplifying n + 36 = -35.496478699 Reorder the terms: 36 + n = -35.496478699 Solving 36 + n = -35.496478699 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-36' to each side of the equation. 36 + -36 + n = -35.496478699 + -36 Combine like terms: 36 + -36 = 0 0 + n = -35.496478699 + -36 n = -35.496478699 + -36 Combine like terms: -35.496478699 + -36 = -71.496478699 n = -71.496478699 Simplifying n = -71.496478699

Solution

The solution to the problem is based on the solutions from the subproblems. n = {-0.503521301, -71.496478699}

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