(3k)(3k)=8k+8

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Solution for (3k)(3k)=8k+8 equation:


Simplifying
(3k)(3k) = 8k + 8

Remove parenthesis around (3k)
3k(3k) = 8k + 8

Remove parenthesis around (3k)
3k * 3k = 8k + 8

Reorder the terms for easier multiplication:
3 * 3k * k = 8k + 8

Multiply 3 * 3
9k * k = 8k + 8

Multiply k * k
9k2 = 8k + 8

Reorder the terms:
9k2 = 8 + 8k

Solving
9k2 = 8 + 8k

Solving for variable 'k'.

Reorder the terms:
-8 + -8k + 9k2 = 8 + 8k + -8 + -8k

Reorder the terms:
-8 + -8k + 9k2 = 8 + -8 + 8k + -8k

Combine like terms: 8 + -8 = 0
-8 + -8k + 9k2 = 0 + 8k + -8k
-8 + -8k + 9k2 = 8k + -8k

Combine like terms: 8k + -8k = 0
-8 + -8k + 9k2 = 0

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

Divide each side by '9'.
-0.8888888889 + -0.8888888889k + k2 = 0

Move the constant term to the right:

Add '0.8888888889' to each side of the equation.
-0.8888888889 + -0.8888888889k + 0.8888888889 + k2 = 0 + 0.8888888889

Reorder the terms:
-0.8888888889 + 0.8888888889 + -0.8888888889k + k2 = 0 + 0.8888888889

Combine like terms: -0.8888888889 + 0.8888888889 = 0.0000000000
0.0000000000 + -0.8888888889k + k2 = 0 + 0.8888888889
-0.8888888889k + k2 = 0 + 0.8888888889

Combine like terms: 0 + 0.8888888889 = 0.8888888889
-0.8888888889k + k2 = 0.8888888889

The k term is -0.8888888889k.  Take half its coefficient (-0.4444444445).
Square it (0.1975308642) and add it to both sides.

Add '0.1975308642' to each side of the equation.
-0.8888888889k + 0.1975308642 + k2 = 0.8888888889 + 0.1975308642

Reorder the terms:
0.1975308642 + -0.8888888889k + k2 = 0.8888888889 + 0.1975308642

Combine like terms: 0.8888888889 + 0.1975308642 = 1.0864197531
0.1975308642 + -0.8888888889k + k2 = 1.0864197531

Factor a perfect square on the left side:
(k + -0.4444444445)(k + -0.4444444445) = 1.0864197531

Calculate the square root of the right side: 1.042314613

Break this problem into two subproblems by setting 
(k + -0.4444444445) equal to 1.042314613 and -1.042314613.

Subproblem 1

k + -0.4444444445 = 1.042314613 Simplifying k + -0.4444444445 = 1.042314613 Reorder the terms: -0.4444444445 + k = 1.042314613 Solving -0.4444444445 + k = 1.042314613 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '0.4444444445' to each side of the equation. -0.4444444445 + 0.4444444445 + k = 1.042314613 + 0.4444444445 Combine like terms: -0.4444444445 + 0.4444444445 = 0.0000000000 0.0000000000 + k = 1.042314613 + 0.4444444445 k = 1.042314613 + 0.4444444445 Combine like terms: 1.042314613 + 0.4444444445 = 1.4867590575 k = 1.4867590575 Simplifying k = 1.4867590575

Subproblem 2

k + -0.4444444445 = -1.042314613 Simplifying k + -0.4444444445 = -1.042314613 Reorder the terms: -0.4444444445 + k = -1.042314613 Solving -0.4444444445 + k = -1.042314613 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '0.4444444445' to each side of the equation. -0.4444444445 + 0.4444444445 + k = -1.042314613 + 0.4444444445 Combine like terms: -0.4444444445 + 0.4444444445 = 0.0000000000 0.0000000000 + k = -1.042314613 + 0.4444444445 k = -1.042314613 + 0.4444444445 Combine like terms: -1.042314613 + 0.4444444445 = -0.5978701685 k = -0.5978701685 Simplifying k = -0.5978701685

Solution

The solution to the problem is based on the solutions from the subproblems. k = {1.4867590575, -0.5978701685}

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