3k^2-10k-18=-6k^2+3

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Solution for 3k^2-10k-18=-6k^2+3 equation:


Simplifying
3k2 + -10k + -18 = -6k2 + 3

Reorder the terms:
-18 + -10k + 3k2 = -6k2 + 3

Reorder the terms:
-18 + -10k + 3k2 = 3 + -6k2

Solving
-18 + -10k + 3k2 = 3 + -6k2

Solving for variable 'k'.

Reorder the terms:
-18 + -3 + -10k + 3k2 + 6k2 = 3 + -6k2 + -3 + 6k2

Combine like terms: -18 + -3 = -21
-21 + -10k + 3k2 + 6k2 = 3 + -6k2 + -3 + 6k2

Combine like terms: 3k2 + 6k2 = 9k2
-21 + -10k + 9k2 = 3 + -6k2 + -3 + 6k2

Reorder the terms:
-21 + -10k + 9k2 = 3 + -3 + -6k2 + 6k2

Combine like terms: 3 + -3 = 0
-21 + -10k + 9k2 = 0 + -6k2 + 6k2
-21 + -10k + 9k2 = -6k2 + 6k2

Combine like terms: -6k2 + 6k2 = 0
-21 + -10k + 9k2 = 0

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

Divide each side by '9'.
-2.333333333 + -1.111111111k + k2 = 0

Move the constant term to the right:

Add '2.333333333' to each side of the equation.
-2.333333333 + -1.111111111k + 2.333333333 + k2 = 0 + 2.333333333

Reorder the terms:
-2.333333333 + 2.333333333 + -1.111111111k + k2 = 0 + 2.333333333

Combine like terms: -2.333333333 + 2.333333333 = 0.000000000
0.000000000 + -1.111111111k + k2 = 0 + 2.333333333
-1.111111111k + k2 = 0 + 2.333333333

Combine like terms: 0 + 2.333333333 = 2.333333333
-1.111111111k + k2 = 2.333333333

The k term is -1.111111111k.  Take half its coefficient (-0.5555555555).
Square it (0.3086419752) and add it to both sides.

Add '0.3086419752' to each side of the equation.
-1.111111111k + 0.3086419752 + k2 = 2.333333333 + 0.3086419752

Reorder the terms:
0.3086419752 + -1.111111111k + k2 = 2.333333333 + 0.3086419752

Combine like terms: 2.333333333 + 0.3086419752 = 2.6419753082
0.3086419752 + -1.111111111k + k2 = 2.6419753082

Factor a perfect square on the left side:
(k + -0.5555555555)(k + -0.5555555555) = 2.6419753082

Calculate the square root of the right side: 1.625415426

Break this problem into two subproblems by setting 
(k + -0.5555555555) equal to 1.625415426 and -1.625415426.

Subproblem 1

k + -0.5555555555 = 1.625415426 Simplifying k + -0.5555555555 = 1.625415426 Reorder the terms: -0.5555555555 + k = 1.625415426 Solving -0.5555555555 + k = 1.625415426 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '0.5555555555' to each side of the equation. -0.5555555555 + 0.5555555555 + k = 1.625415426 + 0.5555555555 Combine like terms: -0.5555555555 + 0.5555555555 = 0.0000000000 0.0000000000 + k = 1.625415426 + 0.5555555555 k = 1.625415426 + 0.5555555555 Combine like terms: 1.625415426 + 0.5555555555 = 2.1809709815 k = 2.1809709815 Simplifying k = 2.1809709815

Subproblem 2

k + -0.5555555555 = -1.625415426 Simplifying k + -0.5555555555 = -1.625415426 Reorder the terms: -0.5555555555 + k = -1.625415426 Solving -0.5555555555 + k = -1.625415426 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '0.5555555555' to each side of the equation. -0.5555555555 + 0.5555555555 + k = -1.625415426 + 0.5555555555 Combine like terms: -0.5555555555 + 0.5555555555 = 0.0000000000 0.0000000000 + k = -1.625415426 + 0.5555555555 k = -1.625415426 + 0.5555555555 Combine like terms: -1.625415426 + 0.5555555555 = -1.0698598705 k = -1.0698598705 Simplifying k = -1.0698598705

Solution

The solution to the problem is based on the solutions from the subproblems. k = {2.1809709815, -1.0698598705}

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