5n^2+9n-910=0

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Solution for 5n^2+9n-910=0 equation:


Simplifying
5n2 + 9n + -910 = 0

Reorder the terms:
-910 + 9n + 5n2 = 0

Solving
-910 + 9n + 5n2 = 0

Solving for variable 'n'.

Begin completing the square.  Divide all terms by
5 the coefficient of the squared term: 

Divide each side by '5'.
-182 + 1.8n + n2 = 0

Move the constant term to the right:

Add '182' to each side of the equation.
-182 + 1.8n + 182 + n2 = 0 + 182

Reorder the terms:
-182 + 182 + 1.8n + n2 = 0 + 182

Combine like terms: -182 + 182 = 0
0 + 1.8n + n2 = 0 + 182
1.8n + n2 = 0 + 182

Combine like terms: 0 + 182 = 182
1.8n + n2 = 182

The n term is 1.8n.  Take half its coefficient (0.9).
Square it (0.81) and add it to both sides.

Add '0.81' to each side of the equation.
1.8n + 0.81 + n2 = 182 + 0.81

Reorder the terms:
0.81 + 1.8n + n2 = 182 + 0.81

Combine like terms: 182 + 0.81 = 182.81
0.81 + 1.8n + n2 = 182.81

Factor a perfect square on the left side:
(n + 0.9)(n + 0.9) = 182.81

Calculate the square root of the right side: 13.520724833

Break this problem into two subproblems by setting 
(n + 0.9) equal to 13.520724833 and -13.520724833.

Subproblem 1

n + 0.9 = 13.520724833 Simplifying n + 0.9 = 13.520724833 Reorder the terms: 0.9 + n = 13.520724833 Solving 0.9 + n = 13.520724833 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + n = 13.520724833 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + n = 13.520724833 + -0.9 n = 13.520724833 + -0.9 Combine like terms: 13.520724833 + -0.9 = 12.620724833 n = 12.620724833 Simplifying n = 12.620724833

Subproblem 2

n + 0.9 = -13.520724833 Simplifying n + 0.9 = -13.520724833 Reorder the terms: 0.9 + n = -13.520724833 Solving 0.9 + n = -13.520724833 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + n = -13.520724833 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + n = -13.520724833 + -0.9 n = -13.520724833 + -0.9 Combine like terms: -13.520724833 + -0.9 = -14.420724833 n = -14.420724833 Simplifying n = -14.420724833

Solution

The solution to the problem is based on the solutions from the subproblems. n = {12.620724833, -14.420724833}

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