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Simplifying 4k(k + 1) = 25 Reorder the terms: 4k(1 + k) = 25 (1 * 4k + k * 4k) = 25 (4k + 4k2) = 25 Solving 4k + 4k2 = 25 Solving for variable 'k'. Reorder the terms: -25 + 4k + 4k2 = 25 + -25 Combine like terms: 25 + -25 = 0 -25 + 4k + 4k2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -6.25 + k + k2 = 0 Move the constant term to the right: Add '6.25' to each side of the equation. -6.25 + k + 6.25 + k2 = 0 + 6.25 Reorder the terms: -6.25 + 6.25 + k + k2 = 0 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + k + k2 = 0 + 6.25 k + k2 = 0 + 6.25 Combine like terms: 0 + 6.25 = 6.25 k + k2 = 6.25 The k term is k. 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. + 0.25 + k2 = 6.25 + 0.25 Combine like terms: + 0.25 = 1.25 1.25 + k2 = 6.25 + 0.25 Combine like terms: 6.25 + 0.25 = 6.5 1.25 + k2 = 6.5 Factor a perfect square on the left side: (k + 0.5)(k + 0.5) = 6.5 Calculate the square root of the right side: 2.549509757 Break this problem into two subproblems by setting (k + 0.5) equal to 2.549509757 and -2.549509757.Subproblem 1
k + 0.5 = 2.549509757 Simplifying k + 0.5 = 2.549509757 Reorder the terms: 0.5 + k = 2.549509757 Solving 0.5 + k = 2.549509757 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 = 2.549509757 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + k = 2.549509757 + -0.5 k = 2.549509757 + -0.5 Combine like terms: 2.549509757 + -0.5 = 2.049509757 k = 2.049509757 Simplifying k = 2.049509757Subproblem 2
k + 0.5 = -2.549509757 Simplifying k + 0.5 = -2.549509757 Reorder the terms: 0.5 + k = -2.549509757 Solving 0.5 + k = -2.549509757 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 = -2.549509757 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + k = -2.549509757 + -0.5 k = -2.549509757 + -0.5 Combine like terms: -2.549509757 + -0.5 = -3.049509757 k = -3.049509757 Simplifying k = -3.049509757Solution
The solution to the problem is based on the solutions from the subproblems. k = {2.049509757, -3.049509757}
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