3k^2=8k+10

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Solution for 3k^2=8k+10 equation:


Simplifying
3k2 = 8k + 10

Reorder the terms:
3k2 = 10 + 8k

Solving
3k2 = 10 + 8k

Solving for variable 'k'.

Reorder the terms:
-10 + -8k + 3k2 = 10 + 8k + -10 + -8k

Reorder the terms:
-10 + -8k + 3k2 = 10 + -10 + 8k + -8k

Combine like terms: 10 + -10 = 0
-10 + -8k + 3k2 = 0 + 8k + -8k
-10 + -8k + 3k2 = 8k + -8k

Combine like terms: 8k + -8k = 0
-10 + -8k + 3k2 = 0

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

Divide each side by '3'.
-3.333333333 + -2.666666667k + k2 = 0

Move the constant term to the right:

Add '3.333333333' to each side of the equation.
-3.333333333 + -2.666666667k + 3.333333333 + k2 = 0 + 3.333333333

Reorder the terms:
-3.333333333 + 3.333333333 + -2.666666667k + k2 = 0 + 3.333333333

Combine like terms: -3.333333333 + 3.333333333 = 0.000000000
0.000000000 + -2.666666667k + k2 = 0 + 3.333333333
-2.666666667k + k2 = 0 + 3.333333333

Combine like terms: 0 + 3.333333333 = 3.333333333
-2.666666667k + k2 = 3.333333333

The k term is -2.666666667k.  Take half its coefficient (-1.333333334).
Square it (1.777777780) and add it to both sides.

Add '1.777777780' to each side of the equation.
-2.666666667k + 1.777777780 + k2 = 3.333333333 + 1.777777780

Reorder the terms:
1.777777780 + -2.666666667k + k2 = 3.333333333 + 1.777777780

Combine like terms: 3.333333333 + 1.777777780 = 5.111111113
1.777777780 + -2.666666667k + k2 = 5.111111113

Factor a perfect square on the left side:
(k + -1.333333334)(k + -1.333333334) = 5.111111113

Calculate the square root of the right side: 2.260776661

Break this problem into two subproblems by setting 
(k + -1.333333334) equal to 2.260776661 and -2.260776661.

Subproblem 1

k + -1.333333334 = 2.260776661 Simplifying k + -1.333333334 = 2.260776661 Reorder the terms: -1.333333334 + k = 2.260776661 Solving -1.333333334 + k = 2.260776661 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + k = 2.260776661 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + k = 2.260776661 + 1.333333334 k = 2.260776661 + 1.333333334 Combine like terms: 2.260776661 + 1.333333334 = 3.594109995 k = 3.594109995 Simplifying k = 3.594109995

Subproblem 2

k + -1.333333334 = -2.260776661 Simplifying k + -1.333333334 = -2.260776661 Reorder the terms: -1.333333334 + k = -2.260776661 Solving -1.333333334 + k = -2.260776661 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + k = -2.260776661 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + k = -2.260776661 + 1.333333334 k = -2.260776661 + 1.333333334 Combine like terms: -2.260776661 + 1.333333334 = -0.927443327 k = -0.927443327 Simplifying k = -0.927443327

Solution

The solution to the problem is based on the solutions from the subproblems. k = {3.594109995, -0.927443327}

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