10n^2-9n-17=0

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Solution for 10n^2-9n-17=0 equation:


Simplifying
10n2 + -9n + -17 = 0

Reorder the terms:
-17 + -9n + 10n2 = 0

Solving
-17 + -9n + 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'.
-1.7 + -0.9n + n2 = 0

Move the constant term to the right:

Add '1.7' to each side of the equation.
-1.7 + -0.9n + 1.7 + n2 = 0 + 1.7

Reorder the terms:
-1.7 + 1.7 + -0.9n + n2 = 0 + 1.7

Combine like terms: -1.7 + 1.7 = 0.0
0.0 + -0.9n + n2 = 0 + 1.7
-0.9n + n2 = 0 + 1.7

Combine like terms: 0 + 1.7 = 1.7
-0.9n + n2 = 1.7

The n term is -0.9n.  Take half its coefficient (-0.45).
Square it (0.2025) and add it to both sides.

Add '0.2025' to each side of the equation.
-0.9n + 0.2025 + n2 = 1.7 + 0.2025

Reorder the terms:
0.2025 + -0.9n + n2 = 1.7 + 0.2025

Combine like terms: 1.7 + 0.2025 = 1.9025
0.2025 + -0.9n + n2 = 1.9025

Factor a perfect square on the left side:
(n + -0.45)(n + -0.45) = 1.9025

Calculate the square root of the right side: 1.379311422

Break this problem into two subproblems by setting 
(n + -0.45) equal to 1.379311422 and -1.379311422.

Subproblem 1

n + -0.45 = 1.379311422 Simplifying n + -0.45 = 1.379311422 Reorder the terms: -0.45 + n = 1.379311422 Solving -0.45 + n = 1.379311422 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.45' to each side of the equation. -0.45 + 0.45 + n = 1.379311422 + 0.45 Combine like terms: -0.45 + 0.45 = 0.00 0.00 + n = 1.379311422 + 0.45 n = 1.379311422 + 0.45 Combine like terms: 1.379311422 + 0.45 = 1.829311422 n = 1.829311422 Simplifying n = 1.829311422

Subproblem 2

n + -0.45 = -1.379311422 Simplifying n + -0.45 = -1.379311422 Reorder the terms: -0.45 + n = -1.379311422 Solving -0.45 + n = -1.379311422 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.45' to each side of the equation. -0.45 + 0.45 + n = -1.379311422 + 0.45 Combine like terms: -0.45 + 0.45 = 0.00 0.00 + n = -1.379311422 + 0.45 n = -1.379311422 + 0.45 Combine like terms: -1.379311422 + 0.45 = -0.929311422 n = -0.929311422 Simplifying n = -0.929311422

Solution

The solution to the problem is based on the solutions from the subproblems. n = {1.829311422, -0.929311422}

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