n^2+n-1440=0

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Solution for n^2+n-1440=0 equation:


Simplifying
n2 + n + -1440 = 0

Reorder the terms:
-1440 + n + n2 = 0

Solving
-1440 + n + n2 = 0

Solving for variable 'n'.

Begin completing the square.

Move the constant term to the right:

Add '1440' to each side of the equation.
-1440 + n + 1440 + n2 = 0 + 1440

Reorder the terms:
-1440 + 1440 + n + n2 = 0 + 1440

Combine like terms: -1440 + 1440 = 0
0 + n + n2 = 0 + 1440
n + n2 = 0 + 1440

Combine like terms: 0 + 1440 = 1440
n + n2 = 1440

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 = 1440 + 0.25

Reorder the terms:
0.25 + n + n2 = 1440 + 0.25

Combine like terms: 1440 + 0.25 = 1440.25
0.25 + n + n2 = 1440.25

Factor a perfect square on the left side:
(n + 0.5)(n + 0.5) = 1440.25

Calculate the square root of the right side: 37.950625818

Break this problem into two subproblems by setting 
(n + 0.5) equal to 37.950625818 and -37.950625818.

Subproblem 1

n + 0.5 = 37.950625818 Simplifying n + 0.5 = 37.950625818 Reorder the terms: 0.5 + n = 37.950625818 Solving 0.5 + n = 37.950625818 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 = 37.950625818 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + n = 37.950625818 + -0.5 n = 37.950625818 + -0.5 Combine like terms: 37.950625818 + -0.5 = 37.450625818 n = 37.450625818 Simplifying n = 37.450625818

Subproblem 2

n + 0.5 = -37.950625818 Simplifying n + 0.5 = -37.950625818 Reorder the terms: 0.5 + n = -37.950625818 Solving 0.5 + n = -37.950625818 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 = -37.950625818 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + n = -37.950625818 + -0.5 n = -37.950625818 + -0.5 Combine like terms: -37.950625818 + -0.5 = -38.450625818 n = -38.450625818 Simplifying n = -38.450625818

Solution

The solution to the problem is based on the solutions from the subproblems. n = {37.450625818, -38.450625818}

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