9n^2-5=9n

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


Simplifying
9n2 + -5 = 9n

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

Solving
-5 + 9n2 = 9n

Solving for variable 'n'.

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

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

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

Divide each side by '9'.
-0.5555555556 + -1n + n2 = 0

Move the constant term to the right:

Add '0.5555555556' to each side of the equation.
-0.5555555556 + -1n + 0.5555555556 + n2 = 0 + 0.5555555556

Reorder the terms:
-0.5555555556 + 0.5555555556 + -1n + n2 = 0 + 0.5555555556

Combine like terms: -0.5555555556 + 0.5555555556 = 0.0000000000
0.0000000000 + -1n + n2 = 0 + 0.5555555556
-1n + n2 = 0 + 0.5555555556

Combine like terms: 0 + 0.5555555556 = 0.5555555556
-1n + n2 = 0.5555555556

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 = 0.5555555556 + 0.25

Reorder the terms:
0.25 + -1n + n2 = 0.5555555556 + 0.25

Combine like terms: 0.5555555556 + 0.25 = 0.8055555556
0.25 + -1n + n2 = 0.8055555556

Factor a perfect square on the left side:
(n + -0.5)(n + -0.5) = 0.8055555556

Calculate the square root of the right side: 0.897527468

Break this problem into two subproblems by setting 
(n + -0.5) equal to 0.897527468 and -0.897527468.

Subproblem 1

n + -0.5 = 0.897527468 Simplifying n + -0.5 = 0.897527468 Reorder the terms: -0.5 + n = 0.897527468 Solving -0.5 + n = 0.897527468 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 = 0.897527468 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + n = 0.897527468 + 0.5 n = 0.897527468 + 0.5 Combine like terms: 0.897527468 + 0.5 = 1.397527468 n = 1.397527468 Simplifying n = 1.397527468

Subproblem 2

n + -0.5 = -0.897527468 Simplifying n + -0.5 = -0.897527468 Reorder the terms: -0.5 + n = -0.897527468 Solving -0.5 + n = -0.897527468 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 = -0.897527468 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + n = -0.897527468 + 0.5 n = -0.897527468 + 0.5 Combine like terms: -0.897527468 + 0.5 = -0.397527468 n = -0.397527468 Simplifying n = -0.397527468

Solution

The solution to the problem is based on the solutions from the subproblems. n = {1.397527468, -0.397527468}

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