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Simplifying k2 + 8k + -2 = 0 Reorder the terms: -2 + 8k + k2 = 0 Solving -2 + 8k + k2 = 0 Solving for variable 'k'. Begin completing the square. Move the constant term to the right: Add '2' to each side of the equation. -2 + 8k + 2 + k2 = 0 + 2 Reorder the terms: -2 + 2 + 8k + k2 = 0 + 2 Combine like terms: -2 + 2 = 0 0 + 8k + k2 = 0 + 2 8k + k2 = 0 + 2 Combine like terms: 0 + 2 = 2 8k + k2 = 2 The k term is 8k. Take half its coefficient (4). Square it (16) and add it to both sides. Add '16' to each side of the equation. 8k + 16 + k2 = 2 + 16 Reorder the terms: 16 + 8k + k2 = 2 + 16 Combine like terms: 2 + 16 = 18 16 + 8k + k2 = 18 Factor a perfect square on the left side: (k + 4)(k + 4) = 18 Calculate the square root of the right side: 4.242640687 Break this problem into two subproblems by setting (k + 4) equal to 4.242640687 and -4.242640687.Subproblem 1
k + 4 = 4.242640687 Simplifying k + 4 = 4.242640687 Reorder the terms: 4 + k = 4.242640687 Solving 4 + k = 4.242640687 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + k = 4.242640687 + -4 Combine like terms: 4 + -4 = 0 0 + k = 4.242640687 + -4 k = 4.242640687 + -4 Combine like terms: 4.242640687 + -4 = 0.242640687 k = 0.242640687 Simplifying k = 0.242640687Subproblem 2
k + 4 = -4.242640687 Simplifying k + 4 = -4.242640687 Reorder the terms: 4 + k = -4.242640687 Solving 4 + k = -4.242640687 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + k = -4.242640687 + -4 Combine like terms: 4 + -4 = 0 0 + k = -4.242640687 + -4 k = -4.242640687 + -4 Combine like terms: -4.242640687 + -4 = -8.242640687 k = -8.242640687 Simplifying k = -8.242640687Solution
The solution to the problem is based on the solutions from the subproblems. k = {0.242640687, -8.242640687}
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