n^2-4=10n

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Solution for n^2-4=10n equation:


Simplifying
n2 + -4 = 10n

Reorder the terms:
-4 + n2 = 10n

Solving
-4 + n2 = 10n

Solving for variable 'n'.

Reorder the terms:
-4 + -10n + n2 = 10n + -10n

Combine like terms: 10n + -10n = 0
-4 + -10n + n2 = 0

Begin completing the square.

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + -10n + 4 + n2 = 0 + 4

Reorder the terms:
-4 + 4 + -10n + n2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -10n + n2 = 0 + 4
-10n + n2 = 0 + 4

Combine like terms: 0 + 4 = 4
-10n + n2 = 4

The n term is -10n.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10n + 25 + n2 = 4 + 25

Reorder the terms:
25 + -10n + n2 = 4 + 25

Combine like terms: 4 + 25 = 29
25 + -10n + n2 = 29

Factor a perfect square on the left side:
(n + -5)(n + -5) = 29

Calculate the square root of the right side: 5.385164807

Break this problem into two subproblems by setting 
(n + -5) equal to 5.385164807 and -5.385164807.

Subproblem 1

n + -5 = 5.385164807 Simplifying n + -5 = 5.385164807 Reorder the terms: -5 + n = 5.385164807 Solving -5 + n = 5.385164807 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + n = 5.385164807 + 5 Combine like terms: -5 + 5 = 0 0 + n = 5.385164807 + 5 n = 5.385164807 + 5 Combine like terms: 5.385164807 + 5 = 10.385164807 n = 10.385164807 Simplifying n = 10.385164807

Subproblem 2

n + -5 = -5.385164807 Simplifying n + -5 = -5.385164807 Reorder the terms: -5 + n = -5.385164807 Solving -5 + n = -5.385164807 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + n = -5.385164807 + 5 Combine like terms: -5 + 5 = 0 0 + n = -5.385164807 + 5 n = -5.385164807 + 5 Combine like terms: -5.385164807 + 5 = -0.385164807 n = -0.385164807 Simplifying n = -0.385164807

Solution

The solution to the problem is based on the solutions from the subproblems. n = {10.385164807, -0.385164807}

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