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Simplifying 8k2 + -8k + -5 = 0 Reorder the terms: -5 + -8k + 8k2 = 0 Solving -5 + -8k + 8k2 = 0 Solving for variable 'k'. Begin completing the square. Divide all terms by 8 the coefficient of the squared term: Divide each side by '8'. -0.625 + -1k + k2 = 0 Move the constant term to the right: Add '0.625' to each side of the equation. -0.625 + -1k + 0.625 + k2 = 0 + 0.625 Reorder the terms: -0.625 + 0.625 + -1k + k2 = 0 + 0.625 Combine like terms: -0.625 + 0.625 = 0.000 0.000 + -1k + k2 = 0 + 0.625 -1k + k2 = 0 + 0.625 Combine like terms: 0 + 0.625 = 0.625 -1k + k2 = 0.625 The k term is -1k. Take half its coefficient (-0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. -1k + 0.25 + k2 = 0.625 + 0.25 Reorder the terms: 0.25 + -1k + k2 = 0.625 + 0.25 Combine like terms: 0.625 + 0.25 = 0.875 0.25 + -1k + k2 = 0.875 Factor a perfect square on the left side: (k + -0.5)(k + -0.5) = 0.875 Calculate the square root of the right side: 0.935414347 Break this problem into two subproblems by setting (k + -0.5) equal to 0.935414347 and -0.935414347.Subproblem 1
k + -0.5 = 0.935414347 Simplifying k + -0.5 = 0.935414347 Reorder the terms: -0.5 + k = 0.935414347 Solving -0.5 + k = 0.935414347 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + k = 0.935414347 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + k = 0.935414347 + 0.5 k = 0.935414347 + 0.5 Combine like terms: 0.935414347 + 0.5 = 1.435414347 k = 1.435414347 Simplifying k = 1.435414347Subproblem 2
k + -0.5 = -0.935414347 Simplifying k + -0.5 = -0.935414347 Reorder the terms: -0.5 + k = -0.935414347 Solving -0.5 + k = -0.935414347 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + k = -0.935414347 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + k = -0.935414347 + 0.5 k = -0.935414347 + 0.5 Combine like terms: -0.935414347 + 0.5 = -0.435414347 k = -0.435414347 Simplifying k = -0.435414347Solution
The solution to the problem is based on the solutions from the subproblems. k = {1.435414347, -0.435414347}
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