9k^2-6k-9=0

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Solution for 9k^2-6k-9=0 equation:


Simplifying
9k2 + -6k + -9 = 0

Reorder the terms:
-9 + -6k + 9k2 = 0

Solving
-9 + -6k + 9k2 = 0

Solving for variable 'k'.

Factor out the Greatest Common Factor (GCF), '3'.
3(-3 + -2k + 3k2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-3 + -2k + 3k2)' equal to zero and attempt to solve: Simplifying -3 + -2k + 3k2 = 0 Solving -3 + -2k + 3k2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -1 + -0.6666666667k + k2 = 0 Move the constant term to the right: Add '1' to each side of the equation. -1 + -0.6666666667k + 1 + k2 = 0 + 1 Reorder the terms: -1 + 1 + -0.6666666667k + k2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -0.6666666667k + k2 = 0 + 1 -0.6666666667k + k2 = 0 + 1 Combine like terms: 0 + 1 = 1 -0.6666666667k + k2 = 1 The k term is -0.6666666667k. Take half its coefficient (-0.3333333334). Square it (0.1111111112) and add it to both sides. Add '0.1111111112' to each side of the equation. -0.6666666667k + 0.1111111112 + k2 = 1 + 0.1111111112 Reorder the terms: 0.1111111112 + -0.6666666667k + k2 = 1 + 0.1111111112 Combine like terms: 1 + 0.1111111112 = 1.1111111112 0.1111111112 + -0.6666666667k + k2 = 1.1111111112 Factor a perfect square on the left side: (k + -0.3333333334)(k + -0.3333333334) = 1.1111111112 Calculate the square root of the right side: 1.054092553 Break this problem into two subproblems by setting (k + -0.3333333334) equal to 1.054092553 and -1.054092553.

Subproblem 1

k + -0.3333333334 = 1.054092553 Simplifying k + -0.3333333334 = 1.054092553 Reorder the terms: -0.3333333334 + k = 1.054092553 Solving -0.3333333334 + k = 1.054092553 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '0.3333333334' to each side of the equation. -0.3333333334 + 0.3333333334 + k = 1.054092553 + 0.3333333334 Combine like terms: -0.3333333334 + 0.3333333334 = 0.0000000000 0.0000000000 + k = 1.054092553 + 0.3333333334 k = 1.054092553 + 0.3333333334 Combine like terms: 1.054092553 + 0.3333333334 = 1.3874258864 k = 1.3874258864 Simplifying k = 1.3874258864

Subproblem 2

k + -0.3333333334 = -1.054092553 Simplifying k + -0.3333333334 = -1.054092553 Reorder the terms: -0.3333333334 + k = -1.054092553 Solving -0.3333333334 + k = -1.054092553 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '0.3333333334' to each side of the equation. -0.3333333334 + 0.3333333334 + k = -1.054092553 + 0.3333333334 Combine like terms: -0.3333333334 + 0.3333333334 = 0.0000000000 0.0000000000 + k = -1.054092553 + 0.3333333334 k = -1.054092553 + 0.3333333334 Combine like terms: -1.054092553 + 0.3333333334 = -0.7207592196 k = -0.7207592196 Simplifying k = -0.7207592196

Solution

The solution to the problem is based on the solutions from the subproblems. k = {1.3874258864, -0.7207592196}

Solution

k = {1.3874258864, -0.7207592196}

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