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Simplifying -1z2 + -4z + -2 = 0 Reorder the terms: -2 + -4z + -1z2 = 0 Solving -2 + -4z + -1z2 = 0 Solving for variable 'z'. Factor out the Greatest Common Factor (GCF), '-1'. -1(2 + 4z + z2) = 0 Ignore the factor -1.Subproblem 1
Set the factor '(2 + 4z + z2)' equal to zero and attempt to solve: Simplifying 2 + 4z + z2 = 0 Solving 2 + 4z + z2 = 0 Begin completing the square. Move the constant term to the right: Add '-2' to each side of the equation. 2 + 4z + -2 + z2 = 0 + -2 Reorder the terms: 2 + -2 + 4z + z2 = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 4z + z2 = 0 + -2 4z + z2 = 0 + -2 Combine like terms: 0 + -2 = -2 4z + z2 = -2 The z term is 4z. Take half its coefficient (2). Square it (4) and add it to both sides. Add '4' to each side of the equation. 4z + 4 + z2 = -2 + 4 Reorder the terms: 4 + 4z + z2 = -2 + 4 Combine like terms: -2 + 4 = 2 4 + 4z + z2 = 2 Factor a perfect square on the left side: (z + 2)(z + 2) = 2 Calculate the square root of the right side: 1.414213562 Break this problem into two subproblems by setting (z + 2) equal to 1.414213562 and -1.414213562.Subproblem 1
z + 2 = 1.414213562 Simplifying z + 2 = 1.414213562 Reorder the terms: 2 + z = 1.414213562 Solving 2 + z = 1.414213562 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + z = 1.414213562 + -2 Combine like terms: 2 + -2 = 0 0 + z = 1.414213562 + -2 z = 1.414213562 + -2 Combine like terms: 1.414213562 + -2 = -0.585786438 z = -0.585786438 Simplifying z = -0.585786438Subproblem 2
z + 2 = -1.414213562 Simplifying z + 2 = -1.414213562 Reorder the terms: 2 + z = -1.414213562 Solving 2 + z = -1.414213562 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + z = -1.414213562 + -2 Combine like terms: 2 + -2 = 0 0 + z = -1.414213562 + -2 z = -1.414213562 + -2 Combine like terms: -1.414213562 + -2 = -3.414213562 z = -3.414213562 Simplifying z = -3.414213562Solution
The solution to the problem is based on the solutions from the subproblems. z = {-0.585786438, -3.414213562}Solution
z = {-0.585786438, -3.414213562}
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