k^2-26k-17=0

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Solution for k^2-26k-17=0 equation:


Simplifying
k2 + -26k + -17 = 0

Reorder the terms:
-17 + -26k + k2 = 0

Solving
-17 + -26k + k2 = 0

Solving for variable 'k'.

Begin completing the square.

Move the constant term to the right:

Add '17' to each side of the equation.
-17 + -26k + 17 + k2 = 0 + 17

Reorder the terms:
-17 + 17 + -26k + k2 = 0 + 17

Combine like terms: -17 + 17 = 0
0 + -26k + k2 = 0 + 17
-26k + k2 = 0 + 17

Combine like terms: 0 + 17 = 17
-26k + k2 = 17

The k term is -26k.  Take half its coefficient (-13).
Square it (169) and add it to both sides.

Add '169' to each side of the equation.
-26k + 169 + k2 = 17 + 169

Reorder the terms:
169 + -26k + k2 = 17 + 169

Combine like terms: 17 + 169 = 186
169 + -26k + k2 = 186

Factor a perfect square on the left side:
(k + -13)(k + -13) = 186

Calculate the square root of the right side: 13.638181697

Break this problem into two subproblems by setting 
(k + -13) equal to 13.638181697 and -13.638181697.

Subproblem 1

k + -13 = 13.638181697 Simplifying k + -13 = 13.638181697 Reorder the terms: -13 + k = 13.638181697 Solving -13 + k = 13.638181697 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + k = 13.638181697 + 13 Combine like terms: -13 + 13 = 0 0 + k = 13.638181697 + 13 k = 13.638181697 + 13 Combine like terms: 13.638181697 + 13 = 26.638181697 k = 26.638181697 Simplifying k = 26.638181697

Subproblem 2

k + -13 = -13.638181697 Simplifying k + -13 = -13.638181697 Reorder the terms: -13 + k = -13.638181697 Solving -13 + k = -13.638181697 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + k = -13.638181697 + 13 Combine like terms: -13 + 13 = 0 0 + k = -13.638181697 + 13 k = -13.638181697 + 13 Combine like terms: -13.638181697 + 13 = -0.638181697 k = -0.638181697 Simplifying k = -0.638181697

Solution

The solution to the problem is based on the solutions from the subproblems. k = {26.638181697, -0.638181697}

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