n^2+2n-330=0

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Solution for n^2+2n-330=0 equation:


Simplifying
n2 + 2n + -330 = 0

Reorder the terms:
-330 + 2n + n2 = 0

Solving
-330 + 2n + n2 = 0

Solving for variable 'n'.

Begin completing the square.

Move the constant term to the right:

Add '330' to each side of the equation.
-330 + 2n + 330 + n2 = 0 + 330

Reorder the terms:
-330 + 330 + 2n + n2 = 0 + 330

Combine like terms: -330 + 330 = 0
0 + 2n + n2 = 0 + 330
2n + n2 = 0 + 330

Combine like terms: 0 + 330 = 330
2n + n2 = 330

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 = 330 + 1

Reorder the terms:
1 + 2n + n2 = 330 + 1

Combine like terms: 330 + 1 = 331
1 + 2n + n2 = 331

Factor a perfect square on the left side:
(n + 1)(n + 1) = 331

Calculate the square root of the right side: 18.193405399

Break this problem into two subproblems by setting 
(n + 1) equal to 18.193405399 and -18.193405399.

Subproblem 1

n + 1 = 18.193405399 Simplifying n + 1 = 18.193405399 Reorder the terms: 1 + n = 18.193405399 Solving 1 + n = 18.193405399 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 = 18.193405399 + -1 Combine like terms: 1 + -1 = 0 0 + n = 18.193405399 + -1 n = 18.193405399 + -1 Combine like terms: 18.193405399 + -1 = 17.193405399 n = 17.193405399 Simplifying n = 17.193405399

Subproblem 2

n + 1 = -18.193405399 Simplifying n + 1 = -18.193405399 Reorder the terms: 1 + n = -18.193405399 Solving 1 + n = -18.193405399 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 = -18.193405399 + -1 Combine like terms: 1 + -1 = 0 0 + n = -18.193405399 + -1 n = -18.193405399 + -1 Combine like terms: -18.193405399 + -1 = -19.193405399 n = -19.193405399 Simplifying n = -19.193405399

Solution

The solution to the problem is based on the solutions from the subproblems. n = {17.193405399, -19.193405399}

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