(10-3.2n)n=2

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Solution for (10-3.2n)n=2 equation:


Simplifying
(10 + -3.2n) * n = 2

Reorder the terms for easier multiplication:
n(10 + -3.2n) = 2
(10 * n + -3.2n * n) = 2
(10n + -3.2n2) = 2

Solving
10n + -3.2n2 = 2

Solving for variable 'n'.

Reorder the terms:
-2 + 10n + -3.2n2 = 2 + -2

Combine like terms: 2 + -2 = 0
-2 + 10n + -3.2n2 = 0

Begin completing the square.  Divide all terms by
-3.2 the coefficient of the squared term: 

Divide each side by '-3.2'.
0.625 + -3.125n + n2 = 0

Move the constant term to the right:

Add '-0.625' to each side of the equation.
0.625 + -3.125n + -0.625 + n2 = 0 + -0.625

Reorder the terms:
0.625 + -0.625 + -3.125n + n2 = 0 + -0.625

Combine like terms: 0.625 + -0.625 = 0.000
0.000 + -3.125n + n2 = 0 + -0.625
-3.125n + n2 = 0 + -0.625

Combine like terms: 0 + -0.625 = -0.625
-3.125n + n2 = -0.625

The n term is -3.125n.  Take half its coefficient (-1.5625).
Square it (2.44140625) and add it to both sides.

Add '2.44140625' to each side of the equation.
-3.125n + 2.44140625 + n2 = -0.625 + 2.44140625

Reorder the terms:
2.44140625 + -3.125n + n2 = -0.625 + 2.44140625

Combine like terms: -0.625 + 2.44140625 = 1.81640625
2.44140625 + -3.125n + n2 = 1.81640625

Factor a perfect square on the left side:
(n + -1.5625)(n + -1.5625) = 1.81640625

Calculate the square root of the right side: 1.347741166

Break this problem into two subproblems by setting 
(n + -1.5625) equal to 1.347741166 and -1.347741166.

Subproblem 1

n + -1.5625 = 1.347741166 Simplifying n + -1.5625 = 1.347741166 Reorder the terms: -1.5625 + n = 1.347741166 Solving -1.5625 + n = 1.347741166 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '1.5625' to each side of the equation. -1.5625 + 1.5625 + n = 1.347741166 + 1.5625 Combine like terms: -1.5625 + 1.5625 = 0.0000 0.0000 + n = 1.347741166 + 1.5625 n = 1.347741166 + 1.5625 Combine like terms: 1.347741166 + 1.5625 = 2.910241166 n = 2.910241166 Simplifying n = 2.910241166

Subproblem 2

n + -1.5625 = -1.347741166 Simplifying n + -1.5625 = -1.347741166 Reorder the terms: -1.5625 + n = -1.347741166 Solving -1.5625 + n = -1.347741166 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '1.5625' to each side of the equation. -1.5625 + 1.5625 + n = -1.347741166 + 1.5625 Combine like terms: -1.5625 + 1.5625 = 0.0000 0.0000 + n = -1.347741166 + 1.5625 n = -1.347741166 + 1.5625 Combine like terms: -1.347741166 + 1.5625 = 0.214758834 n = 0.214758834 Simplifying n = 0.214758834

Solution

The solution to the problem is based on the solutions from the subproblems. n = {2.910241166, 0.214758834}

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