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Simplifying 4n2 + -8n = 7 Reorder the terms: -8n + 4n2 = 7 Solving -8n + 4n2 = 7 Solving for variable 'n'. Reorder the terms: -7 + -8n + 4n2 = 7 + -7 Combine like terms: 7 + -7 = 0 -7 + -8n + 4n2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -1.75 + -2n + n2 = 0 Move the constant term to the right: Add '1.75' to each side of the equation. -1.75 + -2n + 1.75 + n2 = 0 + 1.75 Reorder the terms: -1.75 + 1.75 + -2n + n2 = 0 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + -2n + n2 = 0 + 1.75 -2n + n2 = 0 + 1.75 Combine like terms: 0 + 1.75 = 1.75 -2n + n2 = 1.75 The n term is -2n. Take half its coefficient (-1). Square it (1) and add it to both sides. Add '1' to each side of the equation. -2n + 1 + n2 = 1.75 + 1 Reorder the terms: 1 + -2n + n2 = 1.75 + 1 Combine like terms: 1.75 + 1 = 2.75 1 + -2n + n2 = 2.75 Factor a perfect square on the left side: (n + -1)(n + -1) = 2.75 Calculate the square root of the right side: 1.658312395 Break this problem into two subproblems by setting (n + -1) equal to 1.658312395 and -1.658312395.Subproblem 1
n + -1 = 1.658312395 Simplifying n + -1 = 1.658312395 Reorder the terms: -1 + n = 1.658312395 Solving -1 + n = 1.658312395 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + n = 1.658312395 + 1 Combine like terms: -1 + 1 = 0 0 + n = 1.658312395 + 1 n = 1.658312395 + 1 Combine like terms: 1.658312395 + 1 = 2.658312395 n = 2.658312395 Simplifying n = 2.658312395Subproblem 2
n + -1 = -1.658312395 Simplifying n + -1 = -1.658312395 Reorder the terms: -1 + n = -1.658312395 Solving -1 + n = -1.658312395 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + n = -1.658312395 + 1 Combine like terms: -1 + 1 = 0 0 + n = -1.658312395 + 1 n = -1.658312395 + 1 Combine like terms: -1.658312395 + 1 = -0.658312395 n = -0.658312395 Simplifying n = -0.658312395Solution
The solution to the problem is based on the solutions from the subproblems. n = {2.658312395, -0.658312395}
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