4k^2-16k=108

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Solution for 4k^2-16k=108 equation:


Simplifying
4k2 + -16k = 108

Reorder the terms:
-16k + 4k2 = 108

Solving
-16k + 4k2 = 108

Solving for variable 'k'.

Reorder the terms:
-108 + -16k + 4k2 = 108 + -108

Combine like terms: 108 + -108 = 0
-108 + -16k + 4k2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-27 + -4k + k2) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-27 + -4k + k2)' equal to zero and attempt to solve: Simplifying -27 + -4k + k2 = 0 Solving -27 + -4k + k2 = 0 Begin completing the square. Move the constant term to the right: Add '27' to each side of the equation. -27 + -4k + 27 + k2 = 0 + 27 Reorder the terms: -27 + 27 + -4k + k2 = 0 + 27 Combine like terms: -27 + 27 = 0 0 + -4k + k2 = 0 + 27 -4k + k2 = 0 + 27 Combine like terms: 0 + 27 = 27 -4k + k2 = 27 The k term is -4k. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4k + 4 + k2 = 27 + 4 Reorder the terms: 4 + -4k + k2 = 27 + 4 Combine like terms: 27 + 4 = 31 4 + -4k + k2 = 31 Factor a perfect square on the left side: (k + -2)(k + -2) = 31 Calculate the square root of the right side: 5.567764363 Break this problem into two subproblems by setting (k + -2) equal to 5.567764363 and -5.567764363.

Subproblem 1

k + -2 = 5.567764363 Simplifying k + -2 = 5.567764363 Reorder the terms: -2 + k = 5.567764363 Solving -2 + k = 5.567764363 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + k = 5.567764363 + 2 Combine like terms: -2 + 2 = 0 0 + k = 5.567764363 + 2 k = 5.567764363 + 2 Combine like terms: 5.567764363 + 2 = 7.567764363 k = 7.567764363 Simplifying k = 7.567764363

Subproblem 2

k + -2 = -5.567764363 Simplifying k + -2 = -5.567764363 Reorder the terms: -2 + k = -5.567764363 Solving -2 + k = -5.567764363 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + k = -5.567764363 + 2 Combine like terms: -2 + 2 = 0 0 + k = -5.567764363 + 2 k = -5.567764363 + 2 Combine like terms: -5.567764363 + 2 = -3.567764363 k = -3.567764363 Simplifying k = -3.567764363

Solution

The solution to the problem is based on the solutions from the subproblems. k = {7.567764363, -3.567764363}

Solution

k = {7.567764363, -3.567764363}

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