7n^2-41n+8=0

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Solution for 7n^2-41n+8=0 equation:


Simplifying
7n2 + -41n + 8 = 0

Reorder the terms:
8 + -41n + 7n2 = 0

Solving
8 + -41n + 7n2 = 0

Solving for variable 'n'.

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

Divide each side by '7'.
1.142857143 + -5.857142857n + n2 = 0

Move the constant term to the right:

Add '-1.142857143' to each side of the equation.
1.142857143 + -5.857142857n + -1.142857143 + n2 = 0 + -1.142857143

Reorder the terms:
1.142857143 + -1.142857143 + -5.857142857n + n2 = 0 + -1.142857143

Combine like terms: 1.142857143 + -1.142857143 = 0.000000000
0.000000000 + -5.857142857n + n2 = 0 + -1.142857143
-5.857142857n + n2 = 0 + -1.142857143

Combine like terms: 0 + -1.142857143 = -1.142857143
-5.857142857n + n2 = -1.142857143

The n term is -5.857142857n.  Take half its coefficient (-2.928571429).
Square it (8.576530615) and add it to both sides.

Add '8.576530615' to each side of the equation.
-5.857142857n + 8.576530615 + n2 = -1.142857143 + 8.576530615

Reorder the terms:
8.576530615 + -5.857142857n + n2 = -1.142857143 + 8.576530615

Combine like terms: -1.142857143 + 8.576530615 = 7.433673472
8.576530615 + -5.857142857n + n2 = 7.433673472

Factor a perfect square on the left side:
(n + -2.928571429)(n + -2.928571429) = 7.433673472

Calculate the square root of the right side: 2.726476384

Break this problem into two subproblems by setting 
(n + -2.928571429) equal to 2.726476384 and -2.726476384.

Subproblem 1

n + -2.928571429 = 2.726476384 Simplifying n + -2.928571429 = 2.726476384 Reorder the terms: -2.928571429 + n = 2.726476384 Solving -2.928571429 + n = 2.726476384 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '2.928571429' to each side of the equation. -2.928571429 + 2.928571429 + n = 2.726476384 + 2.928571429 Combine like terms: -2.928571429 + 2.928571429 = 0.000000000 0.000000000 + n = 2.726476384 + 2.928571429 n = 2.726476384 + 2.928571429 Combine like terms: 2.726476384 + 2.928571429 = 5.655047813 n = 5.655047813 Simplifying n = 5.655047813

Subproblem 2

n + -2.928571429 = -2.726476384 Simplifying n + -2.928571429 = -2.726476384 Reorder the terms: -2.928571429 + n = -2.726476384 Solving -2.928571429 + n = -2.726476384 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '2.928571429' to each side of the equation. -2.928571429 + 2.928571429 + n = -2.726476384 + 2.928571429 Combine like terms: -2.928571429 + 2.928571429 = 0.000000000 0.000000000 + n = -2.726476384 + 2.928571429 n = -2.726476384 + 2.928571429 Combine like terms: -2.726476384 + 2.928571429 = 0.202095045 n = 0.202095045 Simplifying n = 0.202095045

Solution

The solution to the problem is based on the solutions from the subproblems. n = {5.655047813, 0.202095045}

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