3.5K(K)-K=45

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Solution for 3.5K(K)-K=45 equation:


Simplifying
3.5K(K) + -1K = 45

Multiply K * K
3.5K2 + -1K = 45

Reorder the terms:
-1K + 3.5K2 = 45

Solving
-1K + 3.5K2 = 45

Solving for variable 'K'.

Reorder the terms:
-45 + -1K + 3.5K2 = 45 + -45

Combine like terms: 45 + -45 = 0
-45 + -1K + 3.5K2 = 0

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

Divide each side by '3.5'.
-12.85714286 + -0.2857142857K + K2 = 0

Move the constant term to the right:

Add '12.85714286' to each side of the equation.
-12.85714286 + -0.2857142857K + 12.85714286 + K2 = 0 + 12.85714286

Reorder the terms:
-12.85714286 + 12.85714286 + -0.2857142857K + K2 = 0 + 12.85714286

Combine like terms: -12.85714286 + 12.85714286 = 0.00000000
0.00000000 + -0.2857142857K + K2 = 0 + 12.85714286
-0.2857142857K + K2 = 0 + 12.85714286

Combine like terms: 0 + 12.85714286 = 12.85714286
-0.2857142857K + K2 = 12.85714286

The K term is -0.2857142857K.  Take half its coefficient (-0.1428571429).
Square it (0.02040816328) and add it to both sides.

Add '0.02040816328' to each side of the equation.
-0.2857142857K + 0.02040816328 + K2 = 12.85714286 + 0.02040816328

Reorder the terms:
0.02040816328 + -0.2857142857K + K2 = 12.85714286 + 0.02040816328

Combine like terms: 12.85714286 + 0.02040816328 = 12.87755102328
0.02040816328 + -0.2857142857K + K2 = 12.87755102328

Factor a perfect square on the left side:
(K + -0.1428571429)(K + -0.1428571429) = 12.87755102328

Calculate the square root of the right side: 3.588530482

Break this problem into two subproblems by setting 
(K + -0.1428571429) equal to 3.588530482 and -3.588530482.

Subproblem 1

K + -0.1428571429 = 3.588530482 Simplifying K + -0.1428571429 = 3.588530482 Reorder the terms: -0.1428571429 + K = 3.588530482 Solving -0.1428571429 + K = 3.588530482 Solving for variable 'K'. Move all terms containing K to the left, all other terms to the right. Add '0.1428571429' to each side of the equation. -0.1428571429 + 0.1428571429 + K = 3.588530482 + 0.1428571429 Combine like terms: -0.1428571429 + 0.1428571429 = 0.0000000000 0.0000000000 + K = 3.588530482 + 0.1428571429 K = 3.588530482 + 0.1428571429 Combine like terms: 3.588530482 + 0.1428571429 = 3.7313876249 K = 3.7313876249 Simplifying K = 3.7313876249

Subproblem 2

K + -0.1428571429 = -3.588530482 Simplifying K + -0.1428571429 = -3.588530482 Reorder the terms: -0.1428571429 + K = -3.588530482 Solving -0.1428571429 + K = -3.588530482 Solving for variable 'K'. Move all terms containing K to the left, all other terms to the right. Add '0.1428571429' to each side of the equation. -0.1428571429 + 0.1428571429 + K = -3.588530482 + 0.1428571429 Combine like terms: -0.1428571429 + 0.1428571429 = 0.0000000000 0.0000000000 + K = -3.588530482 + 0.1428571429 K = -3.588530482 + 0.1428571429 Combine like terms: -3.588530482 + 0.1428571429 = -3.4456733391 K = -3.4456733391 Simplifying K = -3.4456733391

Solution

The solution to the problem is based on the solutions from the subproblems. K = {3.7313876249, -3.4456733391}

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