n^2+n-2400=0

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Solution for n^2+n-2400=0 equation:


Simplifying
n2 + n + -2400 = 0

Reorder the terms:
-2400 + n + n2 = 0

Solving
-2400 + n + n2 = 0

Solving for variable 'n'.

Begin completing the square.

Move the constant term to the right:

Add '2400' to each side of the equation.
-2400 + n + 2400 + n2 = 0 + 2400

Reorder the terms:
-2400 + 2400 + n + n2 = 0 + 2400

Combine like terms: -2400 + 2400 = 0
0 + n + n2 = 0 + 2400
n + n2 = 0 + 2400

Combine like terms: 0 + 2400 = 2400
n + n2 = 2400

The n term is n.  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.
n + 0.25 + n2 = 2400 + 0.25

Reorder the terms:
0.25 + n + n2 = 2400 + 0.25

Combine like terms: 2400 + 0.25 = 2400.25
0.25 + n + n2 = 2400.25

Factor a perfect square on the left side:
(n + 0.5)(n + 0.5) = 2400.25

Calculate the square root of the right side: 48.992346341

Break this problem into two subproblems by setting 
(n + 0.5) equal to 48.992346341 and -48.992346341.

Subproblem 1

n + 0.5 = 48.992346341 Simplifying n + 0.5 = 48.992346341 Reorder the terms: 0.5 + n = 48.992346341 Solving 0.5 + n = 48.992346341 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 = 48.992346341 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + n = 48.992346341 + -0.5 n = 48.992346341 + -0.5 Combine like terms: 48.992346341 + -0.5 = 48.492346341 n = 48.492346341 Simplifying n = 48.492346341

Subproblem 2

n + 0.5 = -48.992346341 Simplifying n + 0.5 = -48.992346341 Reorder the terms: 0.5 + n = -48.992346341 Solving 0.5 + n = -48.992346341 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 = -48.992346341 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + n = -48.992346341 + -0.5 n = -48.992346341 + -0.5 Combine like terms: -48.992346341 + -0.5 = -49.492346341 n = -49.492346341 Simplifying n = -49.492346341

Solution

The solution to the problem is based on the solutions from the subproblems. n = {48.492346341, -49.492346341}

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