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Simplifying 4k2 + 10k = 8 Reorder the terms: 10k + 4k2 = 8 Solving 10k + 4k2 = 8 Solving for variable 'k'. Reorder the terms: -8 + 10k + 4k2 = 8 + -8 Combine like terms: 8 + -8 = 0 -8 + 10k + 4k2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(-4 + 5k + 2k2) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(-4 + 5k + 2k2)' equal to zero and attempt to solve: Simplifying -4 + 5k + 2k2 = 0 Solving -4 + 5k + 2k2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -2 + 2.5k + k2 = 0 Move the constant term to the right: Add '2' to each side of the equation. -2 + 2.5k + 2 + k2 = 0 + 2 Reorder the terms: -2 + 2 + 2.5k + k2 = 0 + 2 Combine like terms: -2 + 2 = 0 0 + 2.5k + k2 = 0 + 2 2.5k + k2 = 0 + 2 Combine like terms: 0 + 2 = 2 2.5k + k2 = 2 The k term is 2.5k. Take half its coefficient (1.25). Square it (1.5625) and add it to both sides. Add '1.5625' to each side of the equation. 2.5k + 1.5625 + k2 = 2 + 1.5625 Reorder the terms: 1.5625 + 2.5k + k2 = 2 + 1.5625 Combine like terms: 2 + 1.5625 = 3.5625 1.5625 + 2.5k + k2 = 3.5625 Factor a perfect square on the left side: (k + 1.25)(k + 1.25) = 3.5625 Calculate the square root of the right side: 1.887458609 Break this problem into two subproblems by setting (k + 1.25) equal to 1.887458609 and -1.887458609.Subproblem 1
k + 1.25 = 1.887458609 Simplifying k + 1.25 = 1.887458609 Reorder the terms: 1.25 + k = 1.887458609 Solving 1.25 + k = 1.887458609 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + k = 1.887458609 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + k = 1.887458609 + -1.25 k = 1.887458609 + -1.25 Combine like terms: 1.887458609 + -1.25 = 0.637458609 k = 0.637458609 Simplifying k = 0.637458609Subproblem 2
k + 1.25 = -1.887458609 Simplifying k + 1.25 = -1.887458609 Reorder the terms: 1.25 + k = -1.887458609 Solving 1.25 + k = -1.887458609 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + k = -1.887458609 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + k = -1.887458609 + -1.25 k = -1.887458609 + -1.25 Combine like terms: -1.887458609 + -1.25 = -3.137458609 k = -3.137458609 Simplifying k = -3.137458609Solution
The solution to the problem is based on the solutions from the subproblems. k = {0.637458609, -3.137458609}Solution
k = {0.637458609, -3.137458609}
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