4k^4+18k^3-6k^2=0

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Solution for 4k^4+18k^3-6k^2=0 equation:


Simplifying
4k4 + 18k3 + -6k2 = 0

Reorder the terms:
-6k2 + 18k3 + 4k4 = 0

Solving
-6k2 + 18k3 + 4k4 = 0

Solving for variable 'k'.

Factor out the Greatest Common Factor (GCF), '2k2'.
2k2(-3 + 9k + 2k2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor 'k2' equal to zero and attempt to solve: Simplifying k2 = 0 Solving k2 = 0 Move all terms containing k to the left, all other terms to the right. Simplifying k2 = 0 Take the square root of each side: k = {0}

Subproblem 2

Set the factor '(-3 + 9k + 2k2)' equal to zero and attempt to solve: Simplifying -3 + 9k + 2k2 = 0 Solving -3 + 9k + 2k2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -1.5 + 4.5k + k2 = 0 Move the constant term to the right: Add '1.5' to each side of the equation. -1.5 + 4.5k + 1.5 + k2 = 0 + 1.5 Reorder the terms: -1.5 + 1.5 + 4.5k + k2 = 0 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + 4.5k + k2 = 0 + 1.5 4.5k + k2 = 0 + 1.5 Combine like terms: 0 + 1.5 = 1.5 4.5k + k2 = 1.5 The k term is 4.5k. Take half its coefficient (2.25). Square it (5.0625) and add it to both sides. Add '5.0625' to each side of the equation. 4.5k + 5.0625 + k2 = 1.5 + 5.0625 Reorder the terms: 5.0625 + 4.5k + k2 = 1.5 + 5.0625 Combine like terms: 1.5 + 5.0625 = 6.5625 5.0625 + 4.5k + k2 = 6.5625 Factor a perfect square on the left side: (k + 2.25)(k + 2.25) = 6.5625 Calculate the square root of the right side: 2.561737691 Break this problem into two subproblems by setting (k + 2.25) equal to 2.561737691 and -2.561737691.

Subproblem 1

k + 2.25 = 2.561737691 Simplifying k + 2.25 = 2.561737691 Reorder the terms: 2.25 + k = 2.561737691 Solving 2.25 + k = 2.561737691 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + k = 2.561737691 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + k = 2.561737691 + -2.25 k = 2.561737691 + -2.25 Combine like terms: 2.561737691 + -2.25 = 0.311737691 k = 0.311737691 Simplifying k = 0.311737691

Subproblem 2

k + 2.25 = -2.561737691 Simplifying k + 2.25 = -2.561737691 Reorder the terms: 2.25 + k = -2.561737691 Solving 2.25 + k = -2.561737691 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + k = -2.561737691 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + k = -2.561737691 + -2.25 k = -2.561737691 + -2.25 Combine like terms: -2.561737691 + -2.25 = -4.811737691 k = -4.811737691 Simplifying k = -4.811737691

Solution

The solution to the problem is based on the solutions from the subproblems. k = {0.311737691, -4.811737691}

Solution

k = {0, 0.311737691, -4.811737691}

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