8(4+2n)n=7

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Solution for 8(4+2n)n=7 equation:


Simplifying
8(4 + 2n) * n = 7

Reorder the terms for easier multiplication:
8n(4 + 2n) = 7
(4 * 8n + 2n * 8n) = 7
(32n + 16n2) = 7

Solving
32n + 16n2 = 7

Solving for variable 'n'.

Reorder the terms:
-7 + 32n + 16n2 = 7 + -7

Combine like terms: 7 + -7 = 0
-7 + 32n + 16n2 = 0

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

Divide each side by '16'.
-0.4375 + 2n + n2 = 0

Move the constant term to the right:

Add '0.4375' to each side of the equation.
-0.4375 + 2n + 0.4375 + n2 = 0 + 0.4375

Reorder the terms:
-0.4375 + 0.4375 + 2n + n2 = 0 + 0.4375

Combine like terms: -0.4375 + 0.4375 = 0.0000
0.0000 + 2n + n2 = 0 + 0.4375
2n + n2 = 0 + 0.4375

Combine like terms: 0 + 0.4375 = 0.4375
2n + n2 = 0.4375

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 = 0.4375 + 1

Reorder the terms:
1 + 2n + n2 = 0.4375 + 1

Combine like terms: 0.4375 + 1 = 1.4375
1 + 2n + n2 = 1.4375

Factor a perfect square on the left side:
(n + 1)(n + 1) = 1.4375

Calculate the square root of the right side: 1.198957881

Break this problem into two subproblems by setting 
(n + 1) equal to 1.198957881 and -1.198957881.

Subproblem 1

n + 1 = 1.198957881 Simplifying n + 1 = 1.198957881 Reorder the terms: 1 + n = 1.198957881 Solving 1 + n = 1.198957881 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 = 1.198957881 + -1 Combine like terms: 1 + -1 = 0 0 + n = 1.198957881 + -1 n = 1.198957881 + -1 Combine like terms: 1.198957881 + -1 = 0.198957881 n = 0.198957881 Simplifying n = 0.198957881

Subproblem 2

n + 1 = -1.198957881 Simplifying n + 1 = -1.198957881 Reorder the terms: 1 + n = -1.198957881 Solving 1 + n = -1.198957881 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 = -1.198957881 + -1 Combine like terms: 1 + -1 = 0 0 + n = -1.198957881 + -1 n = -1.198957881 + -1 Combine like terms: -1.198957881 + -1 = -2.198957881 n = -2.198957881 Simplifying n = -2.198957881

Solution

The solution to the problem is based on the solutions from the subproblems. n = {0.198957881, -2.198957881}

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