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Simplifying 5n2 + -45n + -40 = 0 Reorder the terms: -40 + -45n + 5n2 = 0 Solving -40 + -45n + 5n2 = 0 Solving for variable 'n'. Factor out the Greatest Common Factor (GCF), '5'. 5(-8 + -9n + n2) = 0 Ignore the factor 5.Subproblem 1
Set the factor '(-8 + -9n + n2)' equal to zero and attempt to solve: Simplifying -8 + -9n + n2 = 0 Solving -8 + -9n + n2 = 0 Begin completing the square. Move the constant term to the right: Add '8' to each side of the equation. -8 + -9n + 8 + n2 = 0 + 8 Reorder the terms: -8 + 8 + -9n + n2 = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -9n + n2 = 0 + 8 -9n + n2 = 0 + 8 Combine like terms: 0 + 8 = 8 -9n + n2 = 8 The n term is -9n. Take half its coefficient (-4.5). Square it (20.25) and add it to both sides. Add '20.25' to each side of the equation. -9n + 20.25 + n2 = 8 + 20.25 Reorder the terms: 20.25 + -9n + n2 = 8 + 20.25 Combine like terms: 8 + 20.25 = 28.25 20.25 + -9n + n2 = 28.25 Factor a perfect square on the left side: (n + -4.5)(n + -4.5) = 28.25 Calculate the square root of the right side: 5.315072906 Break this problem into two subproblems by setting (n + -4.5) equal to 5.315072906 and -5.315072906.Subproblem 1
n + -4.5 = 5.315072906 Simplifying n + -4.5 = 5.315072906 Reorder the terms: -4.5 + n = 5.315072906 Solving -4.5 + n = 5.315072906 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + n = 5.315072906 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + n = 5.315072906 + 4.5 n = 5.315072906 + 4.5 Combine like terms: 5.315072906 + 4.5 = 9.815072906 n = 9.815072906 Simplifying n = 9.815072906Subproblem 2
n + -4.5 = -5.315072906 Simplifying n + -4.5 = -5.315072906 Reorder the terms: -4.5 + n = -5.315072906 Solving -4.5 + n = -5.315072906 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + n = -5.315072906 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + n = -5.315072906 + 4.5 n = -5.315072906 + 4.5 Combine like terms: -5.315072906 + 4.5 = -0.815072906 n = -0.815072906 Simplifying n = -0.815072906Solution
The solution to the problem is based on the solutions from the subproblems. n = {9.815072906, -0.815072906}Solution
n = {9.815072906, -0.815072906}
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