n^2+12n-11=-7

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Solution for n^2+12n-11=-7 equation:


Simplifying
n2 + 12n + -11 = -7

Reorder the terms:
-11 + 12n + n2 = -7

Solving
-11 + 12n + n2 = -7

Solving for variable 'n'.

Reorder the terms:
-11 + 7 + 12n + n2 = -7 + 7

Combine like terms: -11 + 7 = -4
-4 + 12n + n2 = -7 + 7

Combine like terms: -7 + 7 = 0
-4 + 12n + n2 = 0

Begin completing the square.

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + 12n + 4 + n2 = 0 + 4

Reorder the terms:
-4 + 4 + 12n + n2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 12n + n2 = 0 + 4
12n + n2 = 0 + 4

Combine like terms: 0 + 4 = 4
12n + n2 = 4

The n term is 12n.  Take half its coefficient (6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
12n + 36 + n2 = 4 + 36

Reorder the terms:
36 + 12n + n2 = 4 + 36

Combine like terms: 4 + 36 = 40
36 + 12n + n2 = 40

Factor a perfect square on the left side:
(n + 6)(n + 6) = 40

Calculate the square root of the right side: 6.32455532

Break this problem into two subproblems by setting 
(n + 6) equal to 6.32455532 and -6.32455532.

Subproblem 1

n + 6 = 6.32455532 Simplifying n + 6 = 6.32455532 Reorder the terms: 6 + n = 6.32455532 Solving 6 + n = 6.32455532 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + n = 6.32455532 + -6 Combine like terms: 6 + -6 = 0 0 + n = 6.32455532 + -6 n = 6.32455532 + -6 Combine like terms: 6.32455532 + -6 = 0.32455532 n = 0.32455532 Simplifying n = 0.32455532

Subproblem 2

n + 6 = -6.32455532 Simplifying n + 6 = -6.32455532 Reorder the terms: 6 + n = -6.32455532 Solving 6 + n = -6.32455532 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + n = -6.32455532 + -6 Combine like terms: 6 + -6 = 0 0 + n = -6.32455532 + -6 n = -6.32455532 + -6 Combine like terms: -6.32455532 + -6 = -12.32455532 n = -12.32455532 Simplifying n = -12.32455532

Solution

The solution to the problem is based on the solutions from the subproblems. n = {0.32455532, -12.32455532}

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