5n^2-17n-6=0

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Solution for 5n^2-17n-6=0 equation:


Simplifying
5n2 + -17n + -6 = 0

Reorder the terms:
-6 + -17n + 5n2 = 0

Solving
-6 + -17n + 5n2 = 0

Solving for variable 'n'.

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

Divide each side by '5'.
-1.2 + -3.4n + n2 = 0

Move the constant term to the right:

Add '1.2' to each side of the equation.
-1.2 + -3.4n + 1.2 + n2 = 0 + 1.2

Reorder the terms:
-1.2 + 1.2 + -3.4n + n2 = 0 + 1.2

Combine like terms: -1.2 + 1.2 = 0.0
0.0 + -3.4n + n2 = 0 + 1.2
-3.4n + n2 = 0 + 1.2

Combine like terms: 0 + 1.2 = 1.2
-3.4n + n2 = 1.2

The n term is -3.4n.  Take half its coefficient (-1.7).
Square it (2.89) and add it to both sides.

Add '2.89' to each side of the equation.
-3.4n + 2.89 + n2 = 1.2 + 2.89

Reorder the terms:
2.89 + -3.4n + n2 = 1.2 + 2.89

Combine like terms: 1.2 + 2.89 = 4.09
2.89 + -3.4n + n2 = 4.09

Factor a perfect square on the left side:
(n + -1.7)(n + -1.7) = 4.09

Calculate the square root of the right side: 2.022374842

Break this problem into two subproblems by setting 
(n + -1.7) equal to 2.022374842 and -2.022374842.

Subproblem 1

n + -1.7 = 2.022374842 Simplifying n + -1.7 = 2.022374842 Reorder the terms: -1.7 + n = 2.022374842 Solving -1.7 + n = 2.022374842 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '1.7' to each side of the equation. -1.7 + 1.7 + n = 2.022374842 + 1.7 Combine like terms: -1.7 + 1.7 = 0.0 0.0 + n = 2.022374842 + 1.7 n = 2.022374842 + 1.7 Combine like terms: 2.022374842 + 1.7 = 3.722374842 n = 3.722374842 Simplifying n = 3.722374842

Subproblem 2

n + -1.7 = -2.022374842 Simplifying n + -1.7 = -2.022374842 Reorder the terms: -1.7 + n = -2.022374842 Solving -1.7 + n = -2.022374842 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '1.7' to each side of the equation. -1.7 + 1.7 + n = -2.022374842 + 1.7 Combine like terms: -1.7 + 1.7 = 0.0 0.0 + n = -2.022374842 + 1.7 n = -2.022374842 + 1.7 Combine like terms: -2.022374842 + 1.7 = -0.322374842 n = -0.322374842 Simplifying n = -0.322374842

Solution

The solution to the problem is based on the solutions from the subproblems. n = {3.722374842, -0.322374842}

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