7264=n(7n+8)

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Solution for 7264=n(7n+8) equation:


Simplifying
7264 = n(7n + 8)

Reorder the terms:
7264 = n(8 + 7n)
7264 = (8 * n + 7n * n)
7264 = (8n + 7n2)

Solving
7264 = 8n + 7n2

Solving for variable 'n'.

Reorder the terms:
7264 + -8n + -7n2 = 8n + -8n + 7n2 + -7n2

Combine like terms: 8n + -8n = 0
7264 + -8n + -7n2 = 0 + 7n2 + -7n2
7264 + -8n + -7n2 = 7n2 + -7n2

Combine like terms: 7n2 + -7n2 = 0
7264 + -8n + -7n2 = 0

Begin completing the square.  Divide all terms by
-7 the coefficient of the squared term: 

Divide each side by '-7'.
-1037.714286 + 1.142857143n + n2 = 0

Move the constant term to the right:

Add '1037.714286' to each side of the equation.
-1037.714286 + 1.142857143n + 1037.714286 + n2 = 0 + 1037.714286

Reorder the terms:
-1037.714286 + 1037.714286 + 1.142857143n + n2 = 0 + 1037.714286

Combine like terms: -1037.714286 + 1037.714286 = 0.000000
0.000000 + 1.142857143n + n2 = 0 + 1037.714286
1.142857143n + n2 = 0 + 1037.714286

Combine like terms: 0 + 1037.714286 = 1037.714286
1.142857143n + n2 = 1037.714286

The n term is 1.142857143n.  Take half its coefficient (0.5714285715).
Square it (0.3265306123) and add it to both sides.

Add '0.3265306123' to each side of the equation.
1.142857143n + 0.3265306123 + n2 = 1037.714286 + 0.3265306123

Reorder the terms:
0.3265306123 + 1.142857143n + n2 = 1037.714286 + 0.3265306123

Combine like terms: 1037.714286 + 0.3265306123 = 1038.0408166123
0.3265306123 + 1.142857143n + n2 = 1038.0408166123

Factor a perfect square on the left side:
(n + 0.5714285715)(n + 0.5714285715) = 1038.0408166123

Calculate the square root of the right side: 32.218640825

Break this problem into two subproblems by setting 
(n + 0.5714285715) equal to 32.218640825 and -32.218640825.

Subproblem 1

n + 0.5714285715 = 32.218640825 Simplifying n + 0.5714285715 = 32.218640825 Reorder the terms: 0.5714285715 + n = 32.218640825 Solving 0.5714285715 + n = 32.218640825 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.5714285715' to each side of the equation. 0.5714285715 + -0.5714285715 + n = 32.218640825 + -0.5714285715 Combine like terms: 0.5714285715 + -0.5714285715 = 0.0000000000 0.0000000000 + n = 32.218640825 + -0.5714285715 n = 32.218640825 + -0.5714285715 Combine like terms: 32.218640825 + -0.5714285715 = 31.6472122535 n = 31.6472122535 Simplifying n = 31.6472122535

Subproblem 2

n + 0.5714285715 = -32.218640825 Simplifying n + 0.5714285715 = -32.218640825 Reorder the terms: 0.5714285715 + n = -32.218640825 Solving 0.5714285715 + n = -32.218640825 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.5714285715' to each side of the equation. 0.5714285715 + -0.5714285715 + n = -32.218640825 + -0.5714285715 Combine like terms: 0.5714285715 + -0.5714285715 = 0.0000000000 0.0000000000 + n = -32.218640825 + -0.5714285715 n = -32.218640825 + -0.5714285715 Combine like terms: -32.218640825 + -0.5714285715 = -32.7900693965 n = -32.7900693965 Simplifying n = -32.7900693965

Solution

The solution to the problem is based on the solutions from the subproblems. n = {31.6472122535, -32.7900693965}

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