n^2-n=561

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Solution for n^2-n=561 equation:


Simplifying
n2 + -1n = 561

Reorder the terms:
-1n + n2 = 561

Solving
-1n + n2 = 561

Solving for variable 'n'.

Reorder the terms:
-561 + -1n + n2 = 561 + -561

Combine like terms: 561 + -561 = 0
-561 + -1n + n2 = 0

Begin completing the square.

Move the constant term to the right:

Add '561' to each side of the equation.
-561 + -1n + 561 + n2 = 0 + 561

Reorder the terms:
-561 + 561 + -1n + n2 = 0 + 561

Combine like terms: -561 + 561 = 0
0 + -1n + n2 = 0 + 561
-1n + n2 = 0 + 561

Combine like terms: 0 + 561 = 561
-1n + n2 = 561

The n term is -1n.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1n + 0.25 + n2 = 561 + 0.25

Reorder the terms:
0.25 + -1n + n2 = 561 + 0.25

Combine like terms: 561 + 0.25 = 561.25
0.25 + -1n + n2 = 561.25

Factor a perfect square on the left side:
(n + -0.5)(n + -0.5) = 561.25

Calculate the square root of the right side: 23.690715481

Break this problem into two subproblems by setting 
(n + -0.5) equal to 23.690715481 and -23.690715481.

Subproblem 1

n + -0.5 = 23.690715481 Simplifying n + -0.5 = 23.690715481 Reorder the terms: -0.5 + n = 23.690715481 Solving -0.5 + n = 23.690715481 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + n = 23.690715481 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + n = 23.690715481 + 0.5 n = 23.690715481 + 0.5 Combine like terms: 23.690715481 + 0.5 = 24.190715481 n = 24.190715481 Simplifying n = 24.190715481

Subproblem 2

n + -0.5 = -23.690715481 Simplifying n + -0.5 = -23.690715481 Reorder the terms: -0.5 + n = -23.690715481 Solving -0.5 + n = -23.690715481 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + n = -23.690715481 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + n = -23.690715481 + 0.5 n = -23.690715481 + 0.5 Combine like terms: -23.690715481 + 0.5 = -23.190715481 n = -23.190715481 Simplifying n = -23.190715481

Solution

The solution to the problem is based on the solutions from the subproblems. n = {24.190715481, -23.190715481}

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