-9n^2-10n=-5

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Solution for -9n^2-10n=-5 equation:


Simplifying
-9n2 + -10n = -5

Reorder the terms:
-10n + -9n2 = -5

Solving
-10n + -9n2 = -5

Solving for variable 'n'.

Reorder the terms:
5 + -10n + -9n2 = -5 + 5

Combine like terms: -5 + 5 = 0
5 + -10n + -9n2 = 0

Begin completing the square.  Divide all terms by
-9 the coefficient of the squared term: 

Divide each side by '-9'.
-0.5555555556 + 1.111111111n + n2 = 0

Move the constant term to the right:

Add '0.5555555556' to each side of the equation.
-0.5555555556 + 1.111111111n + 0.5555555556 + n2 = 0 + 0.5555555556

Reorder the terms:
-0.5555555556 + 0.5555555556 + 1.111111111n + n2 = 0 + 0.5555555556

Combine like terms: -0.5555555556 + 0.5555555556 = 0.0000000000
0.0000000000 + 1.111111111n + n2 = 0 + 0.5555555556
1.111111111n + n2 = 0 + 0.5555555556

Combine like terms: 0 + 0.5555555556 = 0.5555555556
1.111111111n + n2 = 0.5555555556

The n term is 1.111111111n.  Take half its coefficient (0.5555555555).
Square it (0.3086419752) and add it to both sides.

Add '0.3086419752' to each side of the equation.
1.111111111n + 0.3086419752 + n2 = 0.5555555556 + 0.3086419752

Reorder the terms:
0.3086419752 + 1.111111111n + n2 = 0.5555555556 + 0.3086419752

Combine like terms: 0.5555555556 + 0.3086419752 = 0.8641975308
0.3086419752 + 1.111111111n + n2 = 0.8641975308

Factor a perfect square on the left side:
(n + 0.5555555555)(n + 0.5555555555) = 0.8641975308

Calculate the square root of the right side: 0.929622252

Break this problem into two subproblems by setting 
(n + 0.5555555555) equal to 0.929622252 and -0.929622252.

Subproblem 1

n + 0.5555555555 = 0.929622252 Simplifying n + 0.5555555555 = 0.929622252 Reorder the terms: 0.5555555555 + n = 0.929622252 Solving 0.5555555555 + n = 0.929622252 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.5555555555' to each side of the equation. 0.5555555555 + -0.5555555555 + n = 0.929622252 + -0.5555555555 Combine like terms: 0.5555555555 + -0.5555555555 = 0.0000000000 0.0000000000 + n = 0.929622252 + -0.5555555555 n = 0.929622252 + -0.5555555555 Combine like terms: 0.929622252 + -0.5555555555 = 0.3740666965 n = 0.3740666965 Simplifying n = 0.3740666965

Subproblem 2

n + 0.5555555555 = -0.929622252 Simplifying n + 0.5555555555 = -0.929622252 Reorder the terms: 0.5555555555 + n = -0.929622252 Solving 0.5555555555 + n = -0.929622252 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.5555555555' to each side of the equation. 0.5555555555 + -0.5555555555 + n = -0.929622252 + -0.5555555555 Combine like terms: 0.5555555555 + -0.5555555555 = 0.0000000000 0.0000000000 + n = -0.929622252 + -0.5555555555 n = -0.929622252 + -0.5555555555 Combine like terms: -0.929622252 + -0.5555555555 = -1.4851778075 n = -1.4851778075 Simplifying n = -1.4851778075

Solution

The solution to the problem is based on the solutions from the subproblems. n = {0.3740666965, -1.4851778075}

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