5n^2-29n-47=0

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Solution for 5n^2-29n-47=0 equation:


Simplifying
5n2 + -29n + -47 = 0

Reorder the terms:
-47 + -29n + 5n2 = 0

Solving
-47 + -29n + 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'.
-9.4 + -5.8n + n2 = 0

Move the constant term to the right:

Add '9.4' to each side of the equation.
-9.4 + -5.8n + 9.4 + n2 = 0 + 9.4

Reorder the terms:
-9.4 + 9.4 + -5.8n + n2 = 0 + 9.4

Combine like terms: -9.4 + 9.4 = 0.0
0.0 + -5.8n + n2 = 0 + 9.4
-5.8n + n2 = 0 + 9.4

Combine like terms: 0 + 9.4 = 9.4
-5.8n + n2 = 9.4

The n term is -5.8n.  Take half its coefficient (-2.9).
Square it (8.41) and add it to both sides.

Add '8.41' to each side of the equation.
-5.8n + 8.41 + n2 = 9.4 + 8.41

Reorder the terms:
8.41 + -5.8n + n2 = 9.4 + 8.41

Combine like terms: 9.4 + 8.41 = 17.81
8.41 + -5.8n + n2 = 17.81

Factor a perfect square on the left side:
(n + -2.9)(n + -2.9) = 17.81

Calculate the square root of the right side: 4.220189569

Break this problem into two subproblems by setting 
(n + -2.9) equal to 4.220189569 and -4.220189569.

Subproblem 1

n + -2.9 = 4.220189569 Simplifying n + -2.9 = 4.220189569 Reorder the terms: -2.9 + n = 4.220189569 Solving -2.9 + n = 4.220189569 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '2.9' to each side of the equation. -2.9 + 2.9 + n = 4.220189569 + 2.9 Combine like terms: -2.9 + 2.9 = 0.0 0.0 + n = 4.220189569 + 2.9 n = 4.220189569 + 2.9 Combine like terms: 4.220189569 + 2.9 = 7.120189569 n = 7.120189569 Simplifying n = 7.120189569

Subproblem 2

n + -2.9 = -4.220189569 Simplifying n + -2.9 = -4.220189569 Reorder the terms: -2.9 + n = -4.220189569 Solving -2.9 + n = -4.220189569 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '2.9' to each side of the equation. -2.9 + 2.9 + n = -4.220189569 + 2.9 Combine like terms: -2.9 + 2.9 = 0.0 0.0 + n = -4.220189569 + 2.9 n = -4.220189569 + 2.9 Combine like terms: -4.220189569 + 2.9 = -1.320189569 n = -1.320189569 Simplifying n = -1.320189569

Solution

The solution to the problem is based on the solutions from the subproblems. n = {7.120189569, -1.320189569}

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