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Simplifying 2k2 + -20k + -5 = 0 Reorder the terms: -5 + -20k + 2k2 = 0 Solving -5 + -20k + 2k2 = 0 Solving for variable 'k'. Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -2.5 + -10k + k2 = 0 Move the constant term to the right: Add '2.5' to each side of the equation. -2.5 + -10k + 2.5 + k2 = 0 + 2.5 Reorder the terms: -2.5 + 2.5 + -10k + k2 = 0 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + -10k + k2 = 0 + 2.5 -10k + k2 = 0 + 2.5 Combine like terms: 0 + 2.5 = 2.5 -10k + k2 = 2.5 The k term is -10k. Take half its coefficient (-5). Square it (25) and add it to both sides. Add '25' to each side of the equation. -10k + 25 + k2 = 2.5 + 25 Reorder the terms: 25 + -10k + k2 = 2.5 + 25 Combine like terms: 2.5 + 25 = 27.5 25 + -10k + k2 = 27.5 Factor a perfect square on the left side: (k + -5)(k + -5) = 27.5 Calculate the square root of the right side: 5.244044241 Break this problem into two subproblems by setting (k + -5) equal to 5.244044241 and -5.244044241.Subproblem 1
k + -5 = 5.244044241 Simplifying k + -5 = 5.244044241 Reorder the terms: -5 + k = 5.244044241 Solving -5 + k = 5.244044241 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + k = 5.244044241 + 5 Combine like terms: -5 + 5 = 0 0 + k = 5.244044241 + 5 k = 5.244044241 + 5 Combine like terms: 5.244044241 + 5 = 10.244044241 k = 10.244044241 Simplifying k = 10.244044241Subproblem 2
k + -5 = -5.244044241 Simplifying k + -5 = -5.244044241 Reorder the terms: -5 + k = -5.244044241 Solving -5 + k = -5.244044241 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + k = -5.244044241 + 5 Combine like terms: -5 + 5 = 0 0 + k = -5.244044241 + 5 k = -5.244044241 + 5 Combine like terms: -5.244044241 + 5 = -0.244044241 k = -0.244044241 Simplifying k = -0.244044241Solution
The solution to the problem is based on the solutions from the subproblems. k = {10.244044241, -0.244044241}
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