10+n+2(n+10)n+10=130

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Solution for 10+n+2(n+10)n+10=130 equation:


Simplifying
10 + n + 2(n + 10) * n + 10 = 130

Reorder the terms:
10 + n + 2(10 + n) * n + 10 = 130

Reorder the terms for easier multiplication:
10 + n + 2n(10 + n) + 10 = 130
10 + n + (10 * 2n + n * 2n) + 10 = 130
10 + n + (20n + 2n2) + 10 = 130

Reorder the terms:
10 + 10 + n + 20n + 2n2 = 130

Combine like terms: 10 + 10 = 20
20 + n + 20n + 2n2 = 130

Combine like terms: n + 20n = 21n
20 + 21n + 2n2 = 130

Solving
20 + 21n + 2n2 = 130

Solving for variable 'n'.

Reorder the terms:
20 + -130 + 21n + 2n2 = 130 + -130

Combine like terms: 20 + -130 = -110
-110 + 21n + 2n2 = 130 + -130

Combine like terms: 130 + -130 = 0
-110 + 21n + 2n2 = 0

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-55 + 10.5n + n2 = 0

Move the constant term to the right:

Add '55' to each side of the equation.
-55 + 10.5n + 55 + n2 = 0 + 55

Reorder the terms:
-55 + 55 + 10.5n + n2 = 0 + 55

Combine like terms: -55 + 55 = 0
0 + 10.5n + n2 = 0 + 55
10.5n + n2 = 0 + 55

Combine like terms: 0 + 55 = 55
10.5n + n2 = 55

The n term is 10.5n.  Take half its coefficient (5.25).
Square it (27.5625) and add it to both sides.

Add '27.5625' to each side of the equation.
10.5n + 27.5625 + n2 = 55 + 27.5625

Reorder the terms:
27.5625 + 10.5n + n2 = 55 + 27.5625

Combine like terms: 55 + 27.5625 = 82.5625
27.5625 + 10.5n + n2 = 82.5625

Factor a perfect square on the left side:
(n + 5.25)(n + 5.25) = 82.5625

Calculate the square root of the right side: 9.086390923

Break this problem into two subproblems by setting 
(n + 5.25) equal to 9.086390923 and -9.086390923.

Subproblem 1

n + 5.25 = 9.086390923 Simplifying n + 5.25 = 9.086390923 Reorder the terms: 5.25 + n = 9.086390923 Solving 5.25 + n = 9.086390923 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-5.25' to each side of the equation. 5.25 + -5.25 + n = 9.086390923 + -5.25 Combine like terms: 5.25 + -5.25 = 0.00 0.00 + n = 9.086390923 + -5.25 n = 9.086390923 + -5.25 Combine like terms: 9.086390923 + -5.25 = 3.836390923 n = 3.836390923 Simplifying n = 3.836390923

Subproblem 2

n + 5.25 = -9.086390923 Simplifying n + 5.25 = -9.086390923 Reorder the terms: 5.25 + n = -9.086390923 Solving 5.25 + n = -9.086390923 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-5.25' to each side of the equation. 5.25 + -5.25 + n = -9.086390923 + -5.25 Combine like terms: 5.25 + -5.25 = 0.00 0.00 + n = -9.086390923 + -5.25 n = -9.086390923 + -5.25 Combine like terms: -9.086390923 + -5.25 = -14.336390923 n = -14.336390923 Simplifying n = -14.336390923

Solution

The solution to the problem is based on the solutions from the subproblems. n = {3.836390923, -14.336390923}

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