4n^2-17n-4=0

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Solution for 4n^2-17n-4=0 equation:


Simplifying
4n2 + -17n + -4 = 0

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

Solving
-4 + -17n + 4n2 = 0

Solving for variable 'n'.

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

Divide each side by '4'.
-1 + -4.25n + n2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -4.25n + 1 + n2 = 0 + 1

Reorder the terms:
-1 + 1 + -4.25n + n2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -4.25n + n2 = 0 + 1
-4.25n + n2 = 0 + 1

Combine like terms: 0 + 1 = 1
-4.25n + n2 = 1

The n term is -4.25n.  Take half its coefficient (-2.125).
Square it (4.515625) and add it to both sides.

Add '4.515625' to each side of the equation.
-4.25n + 4.515625 + n2 = 1 + 4.515625

Reorder the terms:
4.515625 + -4.25n + n2 = 1 + 4.515625

Combine like terms: 1 + 4.515625 = 5.515625
4.515625 + -4.25n + n2 = 5.515625

Factor a perfect square on the left side:
(n + -2.125)(n + -2.125) = 5.515625

Calculate the square root of the right side: 2.348536779

Break this problem into two subproblems by setting 
(n + -2.125) equal to 2.348536779 and -2.348536779.

Subproblem 1

n + -2.125 = 2.348536779 Simplifying n + -2.125 = 2.348536779 Reorder the terms: -2.125 + n = 2.348536779 Solving -2.125 + n = 2.348536779 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '2.125' to each side of the equation. -2.125 + 2.125 + n = 2.348536779 + 2.125 Combine like terms: -2.125 + 2.125 = 0.000 0.000 + n = 2.348536779 + 2.125 n = 2.348536779 + 2.125 Combine like terms: 2.348536779 + 2.125 = 4.473536779 n = 4.473536779 Simplifying n = 4.473536779

Subproblem 2

n + -2.125 = -2.348536779 Simplifying n + -2.125 = -2.348536779 Reorder the terms: -2.125 + n = -2.348536779 Solving -2.125 + n = -2.348536779 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '2.125' to each side of the equation. -2.125 + 2.125 + n = -2.348536779 + 2.125 Combine like terms: -2.125 + 2.125 = 0.000 0.000 + n = -2.348536779 + 2.125 n = -2.348536779 + 2.125 Combine like terms: -2.348536779 + 2.125 = -0.223536779 n = -0.223536779 Simplifying n = -0.223536779

Solution

The solution to the problem is based on the solutions from the subproblems. n = {4.473536779, -0.223536779}

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