10k^2=7+6k

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Solution for 10k^2=7+6k equation:


Simplifying
10k2 = 7 + 6k

Solving
10k2 = 7 + 6k

Solving for variable 'k'.

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

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

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

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

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

Divide each side by '10'.
-0.7 + -0.6k + k2 = 0

Move the constant term to the right:

Add '0.7' to each side of the equation.
-0.7 + -0.6k + 0.7 + k2 = 0 + 0.7

Reorder the terms:
-0.7 + 0.7 + -0.6k + k2 = 0 + 0.7

Combine like terms: -0.7 + 0.7 = 0.0
0.0 + -0.6k + k2 = 0 + 0.7
-0.6k + k2 = 0 + 0.7

Combine like terms: 0 + 0.7 = 0.7
-0.6k + k2 = 0.7

The k term is -0.6k.  Take half its coefficient (-0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
-0.6k + 0.09 + k2 = 0.7 + 0.09

Reorder the terms:
0.09 + -0.6k + k2 = 0.7 + 0.09

Combine like terms: 0.7 + 0.09 = 0.79
0.09 + -0.6k + k2 = 0.79

Factor a perfect square on the left side:
(k + -0.3)(k + -0.3) = 0.79

Calculate the square root of the right side: 0.888819442

Break this problem into two subproblems by setting 
(k + -0.3) equal to 0.888819442 and -0.888819442.

Subproblem 1

k + -0.3 = 0.888819442 Simplifying k + -0.3 = 0.888819442 Reorder the terms: -0.3 + k = 0.888819442 Solving -0.3 + k = 0.888819442 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + k = 0.888819442 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + k = 0.888819442 + 0.3 k = 0.888819442 + 0.3 Combine like terms: 0.888819442 + 0.3 = 1.188819442 k = 1.188819442 Simplifying k = 1.188819442

Subproblem 2

k + -0.3 = -0.888819442 Simplifying k + -0.3 = -0.888819442 Reorder the terms: -0.3 + k = -0.888819442 Solving -0.3 + k = -0.888819442 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + k = -0.888819442 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + k = -0.888819442 + 0.3 k = -0.888819442 + 0.3 Combine like terms: -0.888819442 + 0.3 = -0.588819442 k = -0.588819442 Simplifying k = -0.588819442

Solution

The solution to the problem is based on the solutions from the subproblems. k = {1.188819442, -0.588819442}

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