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Simplifying n2 + -20n + 100 = 40 Reorder the terms: 100 + -20n + n2 = 40 Solving 100 + -20n + n2 = 40 Solving for variable 'n'. Reorder the terms: 100 + -40 + -20n + n2 = 40 + -40 Combine like terms: 100 + -40 = 60 60 + -20n + n2 = 40 + -40 Combine like terms: 40 + -40 = 0 60 + -20n + n2 = 0 Begin completing the square. Move the constant term to the right: Add '-60' to each side of the equation. 60 + -20n + -60 + n2 = 0 + -60 Reorder the terms: 60 + -60 + -20n + n2 = 0 + -60 Combine like terms: 60 + -60 = 0 0 + -20n + n2 = 0 + -60 -20n + n2 = 0 + -60 Combine like terms: 0 + -60 = -60 -20n + n2 = -60 The n term is -20n. Take half its coefficient (-10). Square it (100) and add it to both sides. Add '100' to each side of the equation. -20n + 100 + n2 = -60 + 100 Reorder the terms: 100 + -20n + n2 = -60 + 100 Combine like terms: -60 + 100 = 40 100 + -20n + n2 = 40 Factor a perfect square on the left side: (n + -10)(n + -10) = 40 Calculate the square root of the right side: 6.32455532 Break this problem into two subproblems by setting (n + -10) equal to 6.32455532 and -6.32455532.Subproblem 1
n + -10 = 6.32455532 Simplifying n + -10 = 6.32455532 Reorder the terms: -10 + n = 6.32455532 Solving -10 + n = 6.32455532 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + n = 6.32455532 + 10 Combine like terms: -10 + 10 = 0 0 + n = 6.32455532 + 10 n = 6.32455532 + 10 Combine like terms: 6.32455532 + 10 = 16.32455532 n = 16.32455532 Simplifying n = 16.32455532Subproblem 2
n + -10 = -6.32455532 Simplifying n + -10 = -6.32455532 Reorder the terms: -10 + n = -6.32455532 Solving -10 + n = -6.32455532 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + n = -6.32455532 + 10 Combine like terms: -10 + 10 = 0 0 + n = -6.32455532 + 10 n = -6.32455532 + 10 Combine like terms: -6.32455532 + 10 = 3.67544468 n = 3.67544468 Simplifying n = 3.67544468Solution
The solution to the problem is based on the solutions from the subproblems. n = {16.32455532, 3.67544468}
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