(8k+k^2-6)-(-10k+7-2k^2)=0

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Solution for (8k+k^2-6)-(-10k+7-2k^2)=0 equation:


Simplifying
(8k + k2 + -6) + -1(-10k + 7 + -2k2) = 0

Reorder the terms:
(-6 + 8k + k2) + -1(-10k + 7 + -2k2) = 0

Remove parenthesis around (-6 + 8k + k2)
-6 + 8k + k2 + -1(-10k + 7 + -2k2) = 0

Reorder the terms:
-6 + 8k + k2 + -1(7 + -10k + -2k2) = 0
-6 + 8k + k2 + (7 * -1 + -10k * -1 + -2k2 * -1) = 0
-6 + 8k + k2 + (-7 + 10k + 2k2) = 0

Reorder the terms:
-6 + -7 + 8k + 10k + k2 + 2k2 = 0

Combine like terms: -6 + -7 = -13
-13 + 8k + 10k + k2 + 2k2 = 0

Combine like terms: 8k + 10k = 18k
-13 + 18k + k2 + 2k2 = 0

Combine like terms: k2 + 2k2 = 3k2
-13 + 18k + 3k2 = 0

Solving
-13 + 18k + 3k2 = 0

Solving for variable 'k'.

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

Divide each side by '3'.
-4.333333333 + 6k + k2 = 0

Move the constant term to the right:

Add '4.333333333' to each side of the equation.
-4.333333333 + 6k + 4.333333333 + k2 = 0 + 4.333333333

Reorder the terms:
-4.333333333 + 4.333333333 + 6k + k2 = 0 + 4.333333333

Combine like terms: -4.333333333 + 4.333333333 = 0.000000000
0.000000000 + 6k + k2 = 0 + 4.333333333
6k + k2 = 0 + 4.333333333

Combine like terms: 0 + 4.333333333 = 4.333333333
6k + k2 = 4.333333333

The k term is 6k.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6k + 9 + k2 = 4.333333333 + 9

Reorder the terms:
9 + 6k + k2 = 4.333333333 + 9

Combine like terms: 4.333333333 + 9 = 13.333333333
9 + 6k + k2 = 13.333333333

Factor a perfect square on the left side:
(k + 3)(k + 3) = 13.333333333

Calculate the square root of the right side: 3.651483717

Break this problem into two subproblems by setting 
(k + 3) equal to 3.651483717 and -3.651483717.

Subproblem 1

k + 3 = 3.651483717 Simplifying k + 3 = 3.651483717 Reorder the terms: 3 + k = 3.651483717 Solving 3 + k = 3.651483717 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + k = 3.651483717 + -3 Combine like terms: 3 + -3 = 0 0 + k = 3.651483717 + -3 k = 3.651483717 + -3 Combine like terms: 3.651483717 + -3 = 0.651483717 k = 0.651483717 Simplifying k = 0.651483717

Subproblem 2

k + 3 = -3.651483717 Simplifying k + 3 = -3.651483717 Reorder the terms: 3 + k = -3.651483717 Solving 3 + k = -3.651483717 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + k = -3.651483717 + -3 Combine like terms: 3 + -3 = 0 0 + k = -3.651483717 + -3 k = -3.651483717 + -3 Combine like terms: -3.651483717 + -3 = -6.651483717 k = -6.651483717 Simplifying k = -6.651483717

Solution

The solution to the problem is based on the solutions from the subproblems. k = {0.651483717, -6.651483717}

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