10n^2-11n-22=0

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Solution for 10n^2-11n-22=0 equation:


Simplifying
10n2 + -11n + -22 = 0

Reorder the terms:
-22 + -11n + 10n2 = 0

Solving
-22 + -11n + 10n2 = 0

Solving for variable 'n'.

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

Divide each side by '10'.
-2.2 + -1.1n + n2 = 0

Move the constant term to the right:

Add '2.2' to each side of the equation.
-2.2 + -1.1n + 2.2 + n2 = 0 + 2.2

Reorder the terms:
-2.2 + 2.2 + -1.1n + n2 = 0 + 2.2

Combine like terms: -2.2 + 2.2 = 0.0
0.0 + -1.1n + n2 = 0 + 2.2
-1.1n + n2 = 0 + 2.2

Combine like terms: 0 + 2.2 = 2.2
-1.1n + n2 = 2.2

The n term is -1.1n.  Take half its coefficient (-0.55).
Square it (0.3025) and add it to both sides.

Add '0.3025' to each side of the equation.
-1.1n + 0.3025 + n2 = 2.2 + 0.3025

Reorder the terms:
0.3025 + -1.1n + n2 = 2.2 + 0.3025

Combine like terms: 2.2 + 0.3025 = 2.5025
0.3025 + -1.1n + n2 = 2.5025

Factor a perfect square on the left side:
(n + -0.55)(n + -0.55) = 2.5025

Calculate the square root of the right side: 1.581929202

Break this problem into two subproblems by setting 
(n + -0.55) equal to 1.581929202 and -1.581929202.

Subproblem 1

n + -0.55 = 1.581929202 Simplifying n + -0.55 = 1.581929202 Reorder the terms: -0.55 + n = 1.581929202 Solving -0.55 + n = 1.581929202 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.55' to each side of the equation. -0.55 + 0.55 + n = 1.581929202 + 0.55 Combine like terms: -0.55 + 0.55 = 0.00 0.00 + n = 1.581929202 + 0.55 n = 1.581929202 + 0.55 Combine like terms: 1.581929202 + 0.55 = 2.131929202 n = 2.131929202 Simplifying n = 2.131929202

Subproblem 2

n + -0.55 = -1.581929202 Simplifying n + -0.55 = -1.581929202 Reorder the terms: -0.55 + n = -1.581929202 Solving -0.55 + n = -1.581929202 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.55' to each side of the equation. -0.55 + 0.55 + n = -1.581929202 + 0.55 Combine like terms: -0.55 + 0.55 = 0.00 0.00 + n = -1.581929202 + 0.55 n = -1.581929202 + 0.55 Combine like terms: -1.581929202 + 0.55 = -1.031929202 n = -1.031929202 Simplifying n = -1.031929202

Solution

The solution to the problem is based on the solutions from the subproblems. n = {2.131929202, -1.031929202}

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