5n^2+17n+4=

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Solution for 5n^2+17n+4= equation:


Simplifying
5n2 + 17n + 4 = 0

Reorder the terms:
4 + 17n + 5n2 = 0

Solving
4 + 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'.
0.8 + 3.4n + n2 = 0

Move the constant term to the right:

Add '-0.8' to each side of the equation.
0.8 + 3.4n + -0.8 + n2 = 0 + -0.8

Reorder the terms:
0.8 + -0.8 + 3.4n + n2 = 0 + -0.8

Combine like terms: 0.8 + -0.8 = 0.0
0.0 + 3.4n + n2 = 0 + -0.8
3.4n + n2 = 0 + -0.8

Combine like terms: 0 + -0.8 = -0.8
3.4n + n2 = -0.8

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 = -0.8 + 2.89

Reorder the terms:
2.89 + 3.4n + n2 = -0.8 + 2.89

Combine like terms: -0.8 + 2.89 = 2.09
2.89 + 3.4n + n2 = 2.09

Factor a perfect square on the left side:
(n + 1.7)(n + 1.7) = 2.09

Calculate the square root of the right side: 1.445683229

Break this problem into two subproblems by setting 
(n + 1.7) equal to 1.445683229 and -1.445683229.

Subproblem 1

n + 1.7 = 1.445683229 Simplifying n + 1.7 = 1.445683229 Reorder the terms: 1.7 + n = 1.445683229 Solving 1.7 + n = 1.445683229 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 = 1.445683229 + -1.7 Combine like terms: 1.7 + -1.7 = 0.0 0.0 + n = 1.445683229 + -1.7 n = 1.445683229 + -1.7 Combine like terms: 1.445683229 + -1.7 = -0.254316771 n = -0.254316771 Simplifying n = -0.254316771

Subproblem 2

n + 1.7 = -1.445683229 Simplifying n + 1.7 = -1.445683229 Reorder the terms: 1.7 + n = -1.445683229 Solving 1.7 + n = -1.445683229 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 = -1.445683229 + -1.7 Combine like terms: 1.7 + -1.7 = 0.0 0.0 + n = -1.445683229 + -1.7 n = -1.445683229 + -1.7 Combine like terms: -1.445683229 + -1.7 = -3.145683229 n = -3.145683229 Simplifying n = -3.145683229

Solution

The solution to the problem is based on the solutions from the subproblems. n = {-0.254316771, -3.145683229}

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