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Simplifying n2 + -8n + -18 = 0 Reorder the terms: -18 + -8n + n2 = 0 Solving -18 + -8n + n2 = 0 Solving for variable 'n'. Begin completing the square. Move the constant term to the right: Add '18' to each side of the equation. -18 + -8n + 18 + n2 = 0 + 18 Reorder the terms: -18 + 18 + -8n + n2 = 0 + 18 Combine like terms: -18 + 18 = 0 0 + -8n + n2 = 0 + 18 -8n + n2 = 0 + 18 Combine like terms: 0 + 18 = 18 -8n + n2 = 18 The n term is -8n. Take half its coefficient (-4). Square it (16) and add it to both sides. Add '16' to each side of the equation. -8n + 16 + n2 = 18 + 16 Reorder the terms: 16 + -8n + n2 = 18 + 16 Combine like terms: 18 + 16 = 34 16 + -8n + n2 = 34 Factor a perfect square on the left side: (n + -4)(n + -4) = 34 Calculate the square root of the right side: 5.830951895 Break this problem into two subproblems by setting (n + -4) equal to 5.830951895 and -5.830951895.Subproblem 1
n + -4 = 5.830951895 Simplifying n + -4 = 5.830951895 Reorder the terms: -4 + n = 5.830951895 Solving -4 + n = 5.830951895 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + n = 5.830951895 + 4 Combine like terms: -4 + 4 = 0 0 + n = 5.830951895 + 4 n = 5.830951895 + 4 Combine like terms: 5.830951895 + 4 = 9.830951895 n = 9.830951895 Simplifying n = 9.830951895Subproblem 2
n + -4 = -5.830951895 Simplifying n + -4 = -5.830951895 Reorder the terms: -4 + n = -5.830951895 Solving -4 + n = -5.830951895 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + n = -5.830951895 + 4 Combine like terms: -4 + 4 = 0 0 + n = -5.830951895 + 4 n = -5.830951895 + 4 Combine like terms: -5.830951895 + 4 = -1.830951895 n = -1.830951895 Simplifying n = -1.830951895Solution
The solution to the problem is based on the solutions from the subproblems. n = {9.830951895, -1.830951895}
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