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Simplifying 2k2 + 7k + -11 = 0 Reorder the terms: -11 + 7k + 2k2 = 0 Solving -11 + 7k + 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'. -5.5 + 3.5k + k2 = 0 Move the constant term to the right: Add '5.5' to each side of the equation. -5.5 + 3.5k + 5.5 + k2 = 0 + 5.5 Reorder the terms: -5.5 + 5.5 + 3.5k + k2 = 0 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + 3.5k + k2 = 0 + 5.5 3.5k + k2 = 0 + 5.5 Combine like terms: 0 + 5.5 = 5.5 3.5k + k2 = 5.5 The k term is 3.5k. Take half its coefficient (1.75). Square it (3.0625) and add it to both sides. Add '3.0625' to each side of the equation. 3.5k + 3.0625 + k2 = 5.5 + 3.0625 Reorder the terms: 3.0625 + 3.5k + k2 = 5.5 + 3.0625 Combine like terms: 5.5 + 3.0625 = 8.5625 3.0625 + 3.5k + k2 = 8.5625 Factor a perfect square on the left side: (k + 1.75)(k + 1.75) = 8.5625 Calculate the square root of the right side: 2.926174978 Break this problem into two subproblems by setting (k + 1.75) equal to 2.926174978 and -2.926174978.Subproblem 1
k + 1.75 = 2.926174978 Simplifying k + 1.75 = 2.926174978 Reorder the terms: 1.75 + k = 2.926174978 Solving 1.75 + k = 2.926174978 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + k = 2.926174978 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + k = 2.926174978 + -1.75 k = 2.926174978 + -1.75 Combine like terms: 2.926174978 + -1.75 = 1.176174978 k = 1.176174978 Simplifying k = 1.176174978Subproblem 2
k + 1.75 = -2.926174978 Simplifying k + 1.75 = -2.926174978 Reorder the terms: 1.75 + k = -2.926174978 Solving 1.75 + k = -2.926174978 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + k = -2.926174978 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + k = -2.926174978 + -1.75 k = -2.926174978 + -1.75 Combine like terms: -2.926174978 + -1.75 = -4.676174978 k = -4.676174978 Simplifying k = -4.676174978Solution
The solution to the problem is based on the solutions from the subproblems. k = {1.176174978, -4.676174978}
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