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Simplifying -8 + 7n + 8n2 = 0 Solving -8 + 7n + 8n2 = 0 Solving for variable 'n'. Begin completing the square. Divide all terms by 8 the coefficient of the squared term: Divide each side by '8'. -1 + 0.875n + n2 = 0 Move the constant term to the right: Add '1' to each side of the equation. -1 + 0.875n + 1 + n2 = 0 + 1 Reorder the terms: -1 + 1 + 0.875n + n2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 0.875n + n2 = 0 + 1 0.875n + n2 = 0 + 1 Combine like terms: 0 + 1 = 1 0.875n + n2 = 1 The n term is 0.875n. Take half its coefficient (0.4375). Square it (0.19140625) and add it to both sides. Add '0.19140625' to each side of the equation. 0.875n + 0.19140625 + n2 = 1 + 0.19140625 Reorder the terms: 0.19140625 + 0.875n + n2 = 1 + 0.19140625 Combine like terms: 1 + 0.19140625 = 1.19140625 0.19140625 + 0.875n + n2 = 1.19140625 Factor a perfect square on the left side: (n + 0.4375)(n + 0.4375) = 1.19140625 Calculate the square root of the right side: 1.091515575 Break this problem into two subproblems by setting (n + 0.4375) equal to 1.091515575 and -1.091515575.Subproblem 1
n + 0.4375 = 1.091515575 Simplifying n + 0.4375 = 1.091515575 Reorder the terms: 0.4375 + n = 1.091515575 Solving 0.4375 + n = 1.091515575 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.4375' to each side of the equation. 0.4375 + -0.4375 + n = 1.091515575 + -0.4375 Combine like terms: 0.4375 + -0.4375 = 0.0000 0.0000 + n = 1.091515575 + -0.4375 n = 1.091515575 + -0.4375 Combine like terms: 1.091515575 + -0.4375 = 0.654015575 n = 0.654015575 Simplifying n = 0.654015575Subproblem 2
n + 0.4375 = -1.091515575 Simplifying n + 0.4375 = -1.091515575 Reorder the terms: 0.4375 + n = -1.091515575 Solving 0.4375 + n = -1.091515575 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.4375' to each side of the equation. 0.4375 + -0.4375 + n = -1.091515575 + -0.4375 Combine like terms: 0.4375 + -0.4375 = 0.0000 0.0000 + n = -1.091515575 + -0.4375 n = -1.091515575 + -0.4375 Combine like terms: -1.091515575 + -0.4375 = -1.529015575 n = -1.529015575 Simplifying n = -1.529015575Solution
The solution to the problem is based on the solutions from the subproblems. n = {0.654015575, -1.529015575}
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