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Simplifying 8z2 + z + -2 = 0 Reorder the terms: -2 + z + 8z2 = 0 Solving -2 + z + 8z2 = 0 Solving for variable 'z'. Begin completing the square. Divide all terms by 8 the coefficient of the squared term: Divide each side by '8'. -0.25 + 0.125z + z2 = 0 Move the constant term to the right: Add '0.25' to each side of the equation. -0.25 + 0.125z + 0.25 + z2 = 0 + 0.25 Reorder the terms: -0.25 + 0.25 + 0.125z + z2 = 0 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + 0.125z + z2 = 0 + 0.25 0.125z + z2 = 0 + 0.25 Combine like terms: 0 + 0.25 = 0.25 0.125z + z2 = 0.25 The z term is z. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. 0.125z + 0.25 + z2 = 0.25 + 0.25 Reorder the terms: 0.25 + 0.125z + z2 = 0.25 + 0.25 Combine like terms: 0.25 + 0.25 = 0.5 0.25 + 0.125z + z2 = 0.5 Factor a perfect square on the left side: (z + 0.5)(z + 0.5) = 0.5 Calculate the square root of the right side: 0.707106781 Break this problem into two subproblems by setting (z + 0.5) equal to 0.707106781 and -0.707106781.Subproblem 1
z + 0.5 = 0.707106781 Simplifying z + 0.5 = 0.707106781 Reorder the terms: 0.5 + z = 0.707106781 Solving 0.5 + z = 0.707106781 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + z = 0.707106781 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + z = 0.707106781 + -0.5 z = 0.707106781 + -0.5 Combine like terms: 0.707106781 + -0.5 = 0.207106781 z = 0.207106781 Simplifying z = 0.207106781Subproblem 2
z + 0.5 = -0.707106781 Simplifying z + 0.5 = -0.707106781 Reorder the terms: 0.5 + z = -0.707106781 Solving 0.5 + z = -0.707106781 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + z = -0.707106781 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + z = -0.707106781 + -0.5 z = -0.707106781 + -0.5 Combine like terms: -0.707106781 + -0.5 = -1.207106781 z = -1.207106781 Simplifying z = -1.207106781Solution
The solution to the problem is based on the solutions from the subproblems. z = {0.207106781, -1.207106781}
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