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Simplifying 5n2 + 7n + -16 = 0 Reorder the terms: -16 + 7n + 5n2 = 0 Solving -16 + 7n + 5n2 = 0 Solving for variable 'n'. Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -3.2 + 1.4n + n2 = 0 Move the constant term to the right: Add '3.2' to each side of the equation. -3.2 + 1.4n + 3.2 + n2 = 0 + 3.2 Reorder the terms: -3.2 + 3.2 + 1.4n + n2 = 0 + 3.2 Combine like terms: -3.2 + 3.2 = 0.0 0.0 + 1.4n + n2 = 0 + 3.2 1.4n + n2 = 0 + 3.2 Combine like terms: 0 + 3.2 = 3.2 1.4n + n2 = 3.2 The n term is 1.4n. Take half its coefficient (0.7). Square it (0.49) and add it to both sides. Add '0.49' to each side of the equation. 1.4n + 0.49 + n2 = 3.2 + 0.49 Reorder the terms: 0.49 + 1.4n + n2 = 3.2 + 0.49 Combine like terms: 3.2 + 0.49 = 3.69 0.49 + 1.4n + n2 = 3.69 Factor a perfect square on the left side: (n + 0.7)(n + 0.7) = 3.69 Calculate the square root of the right side: 1.920937271 Break this problem into two subproblems by setting (n + 0.7) equal to 1.920937271 and -1.920937271.Subproblem 1
n + 0.7 = 1.920937271 Simplifying n + 0.7 = 1.920937271 Reorder the terms: 0.7 + n = 1.920937271 Solving 0.7 + n = 1.920937271 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.7' to each side of the equation. 0.7 + -0.7 + n = 1.920937271 + -0.7 Combine like terms: 0.7 + -0.7 = 0.0 0.0 + n = 1.920937271 + -0.7 n = 1.920937271 + -0.7 Combine like terms: 1.920937271 + -0.7 = 1.220937271 n = 1.220937271 Simplifying n = 1.220937271Subproblem 2
n + 0.7 = -1.920937271 Simplifying n + 0.7 = -1.920937271 Reorder the terms: 0.7 + n = -1.920937271 Solving 0.7 + n = -1.920937271 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.7' to each side of the equation. 0.7 + -0.7 + n = -1.920937271 + -0.7 Combine like terms: 0.7 + -0.7 = 0.0 0.0 + n = -1.920937271 + -0.7 n = -1.920937271 + -0.7 Combine like terms: -1.920937271 + -0.7 = -2.620937271 n = -2.620937271 Simplifying n = -2.620937271Solution
The solution to the problem is based on the solutions from the subproblems. n = {1.220937271, -2.620937271}
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