n^2+2n-68=0

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Solution for n^2+2n-68=0 equation:


Simplifying
n2 + 2n + -68 = 0

Reorder the terms:
-68 + 2n + n2 = 0

Solving
-68 + 2n + n2 = 0

Solving for variable 'n'.

Begin completing the square.

Move the constant term to the right:

Add '68' to each side of the equation.
-68 + 2n + 68 + n2 = 0 + 68

Reorder the terms:
-68 + 68 + 2n + n2 = 0 + 68

Combine like terms: -68 + 68 = 0
0 + 2n + n2 = 0 + 68
2n + n2 = 0 + 68

Combine like terms: 0 + 68 = 68
2n + n2 = 68

The n term is 2n.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2n + 1 + n2 = 68 + 1

Reorder the terms:
1 + 2n + n2 = 68 + 1

Combine like terms: 68 + 1 = 69
1 + 2n + n2 = 69

Factor a perfect square on the left side:
(n + 1)(n + 1) = 69

Calculate the square root of the right side: 8.306623863

Break this problem into two subproblems by setting 
(n + 1) equal to 8.306623863 and -8.306623863.

Subproblem 1

n + 1 = 8.306623863 Simplifying n + 1 = 8.306623863 Reorder the terms: 1 + n = 8.306623863 Solving 1 + n = 8.306623863 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + n = 8.306623863 + -1 Combine like terms: 1 + -1 = 0 0 + n = 8.306623863 + -1 n = 8.306623863 + -1 Combine like terms: 8.306623863 + -1 = 7.306623863 n = 7.306623863 Simplifying n = 7.306623863

Subproblem 2

n + 1 = -8.306623863 Simplifying n + 1 = -8.306623863 Reorder the terms: 1 + n = -8.306623863 Solving 1 + n = -8.306623863 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + n = -8.306623863 + -1 Combine like terms: 1 + -1 = 0 0 + n = -8.306623863 + -1 n = -8.306623863 + -1 Combine like terms: -8.306623863 + -1 = -9.306623863 n = -9.306623863 Simplifying n = -9.306623863

Solution

The solution to the problem is based on the solutions from the subproblems. n = {7.306623863, -9.306623863}

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