n^2+16n-76=0

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Solution for n^2+16n-76=0 equation:


Simplifying
n2 + 16n + -76 = 0

Reorder the terms:
-76 + 16n + n2 = 0

Solving
-76 + 16n + n2 = 0

Solving for variable 'n'.

Begin completing the square.

Move the constant term to the right:

Add '76' to each side of the equation.
-76 + 16n + 76 + n2 = 0 + 76

Reorder the terms:
-76 + 76 + 16n + n2 = 0 + 76

Combine like terms: -76 + 76 = 0
0 + 16n + n2 = 0 + 76
16n + n2 = 0 + 76

Combine like terms: 0 + 76 = 76
16n + n2 = 76

The n term is 16n.  Take half its coefficient (8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
16n + 64 + n2 = 76 + 64

Reorder the terms:
64 + 16n + n2 = 76 + 64

Combine like terms: 76 + 64 = 140
64 + 16n + n2 = 140

Factor a perfect square on the left side:
(n + 8)(n + 8) = 140

Calculate the square root of the right side: 11.832159566

Break this problem into two subproblems by setting 
(n + 8) equal to 11.832159566 and -11.832159566.

Subproblem 1

n + 8 = 11.832159566 Simplifying n + 8 = 11.832159566 Reorder the terms: 8 + n = 11.832159566 Solving 8 + n = 11.832159566 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + n = 11.832159566 + -8 Combine like terms: 8 + -8 = 0 0 + n = 11.832159566 + -8 n = 11.832159566 + -8 Combine like terms: 11.832159566 + -8 = 3.832159566 n = 3.832159566 Simplifying n = 3.832159566

Subproblem 2

n + 8 = -11.832159566 Simplifying n + 8 = -11.832159566 Reorder the terms: 8 + n = -11.832159566 Solving 8 + n = -11.832159566 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + n = -11.832159566 + -8 Combine like terms: 8 + -8 = 0 0 + n = -11.832159566 + -8 n = -11.832159566 + -8 Combine like terms: -11.832159566 + -8 = -19.832159566 n = -19.832159566 Simplifying n = -19.832159566

Solution

The solution to the problem is based on the solutions from the subproblems. n = {3.832159566, -19.832159566}

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