n^2-n-480=0

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Solution for n^2-n-480=0 equation:


Simplifying
n2 + -1n + -480 = 0

Reorder the terms:
-480 + -1n + n2 = 0

Solving
-480 + -1n + n2 = 0

Solving for variable 'n'.

Begin completing the square.

Move the constant term to the right:

Add '480' to each side of the equation.
-480 + -1n + 480 + n2 = 0 + 480

Reorder the terms:
-480 + 480 + -1n + n2 = 0 + 480

Combine like terms: -480 + 480 = 0
0 + -1n + n2 = 0 + 480
-1n + n2 = 0 + 480

Combine like terms: 0 + 480 = 480
-1n + n2 = 480

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 = 480 + 0.25

Reorder the terms:
0.25 + -1n + n2 = 480 + 0.25

Combine like terms: 480 + 0.25 = 480.25
0.25 + -1n + n2 = 480.25

Factor a perfect square on the left side:
(n + -0.5)(n + -0.5) = 480.25

Calculate the square root of the right side: 21.914607001

Break this problem into two subproblems by setting 
(n + -0.5) equal to 21.914607001 and -21.914607001.

Subproblem 1

n + -0.5 = 21.914607001 Simplifying n + -0.5 = 21.914607001 Reorder the terms: -0.5 + n = 21.914607001 Solving -0.5 + n = 21.914607001 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 = 21.914607001 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + n = 21.914607001 + 0.5 n = 21.914607001 + 0.5 Combine like terms: 21.914607001 + 0.5 = 22.414607001 n = 22.414607001 Simplifying n = 22.414607001

Subproblem 2

n + -0.5 = -21.914607001 Simplifying n + -0.5 = -21.914607001 Reorder the terms: -0.5 + n = -21.914607001 Solving -0.5 + n = -21.914607001 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 = -21.914607001 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + n = -21.914607001 + 0.5 n = -21.914607001 + 0.5 Combine like terms: -21.914607001 + 0.5 = -21.414607001 n = -21.414607001 Simplifying n = -21.414607001

Solution

The solution to the problem is based on the solutions from the subproblems. n = {22.414607001, -21.414607001}

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