n^2+2n-41=0

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Solution for n^2+2n-41=0 equation:


Simplifying
n2 + 2n + -41 = 0

Reorder the terms:
-41 + 2n + n2 = 0

Solving
-41 + 2n + n2 = 0

Solving for variable 'n'.

Begin completing the square.

Move the constant term to the right:

Add '41' to each side of the equation.
-41 + 2n + 41 + n2 = 0 + 41

Reorder the terms:
-41 + 41 + 2n + n2 = 0 + 41

Combine like terms: -41 + 41 = 0
0 + 2n + n2 = 0 + 41
2n + n2 = 0 + 41

Combine like terms: 0 + 41 = 41
2n + n2 = 41

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 = 41 + 1

Reorder the terms:
1 + 2n + n2 = 41 + 1

Combine like terms: 41 + 1 = 42
1 + 2n + n2 = 42

Factor a perfect square on the left side:
(n + 1)(n + 1) = 42

Calculate the square root of the right side: 6.480740698

Break this problem into two subproblems by setting 
(n + 1) equal to 6.480740698 and -6.480740698.

Subproblem 1

n + 1 = 6.480740698 Simplifying n + 1 = 6.480740698 Reorder the terms: 1 + n = 6.480740698 Solving 1 + n = 6.480740698 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 = 6.480740698 + -1 Combine like terms: 1 + -1 = 0 0 + n = 6.480740698 + -1 n = 6.480740698 + -1 Combine like terms: 6.480740698 + -1 = 5.480740698 n = 5.480740698 Simplifying n = 5.480740698

Subproblem 2

n + 1 = -6.480740698 Simplifying n + 1 = -6.480740698 Reorder the terms: 1 + n = -6.480740698 Solving 1 + n = -6.480740698 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 = -6.480740698 + -1 Combine like terms: 1 + -1 = 0 0 + n = -6.480740698 + -1 n = -6.480740698 + -1 Combine like terms: -6.480740698 + -1 = -7.480740698 n = -7.480740698 Simplifying n = -7.480740698

Solution

The solution to the problem is based on the solutions from the subproblems. n = {5.480740698, -7.480740698}

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