k(k+1)-549=0

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Solution for k(k+1)-549=0 equation:


Simplifying
k(k + 1) + -549 = 0

Reorder the terms:
k(1 + k) + -549 = 0
(1 * k + k * k) + -549 = 0
(1k + k2) + -549 = 0

Reorder the terms:
-549 + 1k + k2 = 0

Solving
-549 + 1k + k2 = 0

Solving for variable 'k'.

Begin completing the square.

Move the constant term to the right:

Add '549' to each side of the equation.
-549 + 1k + 549 + k2 = 0 + 549

Reorder the terms:
-549 + 549 + 1k + k2 = 0 + 549

Combine like terms: -549 + 549 = 0
0 + 1k + k2 = 0 + 549
1k + k2 = 0 + 549

Combine like terms: 0 + 549 = 549
1k + k2 = 549

The k term is 1k.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
k + 0.25 + k2 = 549 + 0.25

Reorder the terms:
0.25 + k + k2 = 549 + 0.25

Combine like terms: 549 + 0.25 = 549.25
0.25 + k + k2 = 549.25

Factor a perfect square on the left side:
(k + 0.5)(k + 0.5) = 549.25

Calculate the square root of the right side: 23.436083291

Break this problem into two subproblems by setting 
(k + 0.5) equal to 23.436083291 and -23.436083291.

Subproblem 1

k + 0.5 = 23.436083291 Simplifying k + 0.5 = 23.436083291 Reorder the terms: 0.5 + k = 23.436083291 Solving 0.5 + k = 23.436083291 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + k = 23.436083291 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + k = 23.436083291 + -0.5 k = 23.436083291 + -0.5 Combine like terms: 23.436083291 + -0.5 = 22.936083291 k = 22.936083291 Simplifying k = 22.936083291

Subproblem 2

k + 0.5 = -23.436083291 Simplifying k + 0.5 = -23.436083291 Reorder the terms: 0.5 + k = -23.436083291 Solving 0.5 + k = -23.436083291 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + k = -23.436083291 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + k = -23.436083291 + -0.5 k = -23.436083291 + -0.5 Combine like terms: -23.436083291 + -0.5 = -23.936083291 k = -23.936083291 Simplifying k = -23.936083291

Solution

The solution to the problem is based on the solutions from the subproblems. k = {22.936083291, -23.936083291}

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