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Simplifying -2z2 + z + 14 = 0 Reorder the terms: 14 + z + -2z2 = 0 Solving 14 + z + -2z2 = 0 Solving for variable 'z'. Begin completing the square. Divide all terms by -2 the coefficient of the squared term: Divide each side by '-2'. -7 + -0.5z + z2 = 0 Move the constant term to the right: Add '7' to each side of the equation. -7 + -0.5z + 7 + z2 = 0 + 7 Reorder the terms: -7 + 7 + -0.5z + z2 = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -0.5z + z2 = 0 + 7 -0.5z + z2 = 0 + 7 Combine like terms: 0 + 7 = 7 -0.5z + z2 = 7 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. -0.5z + 0.25 + z2 = 7 + 0.25 Reorder the terms: 0.25 + -0.5z + z2 = 7 + 0.25 Combine like terms: 7 + 0.25 = 7.25 0.25 + -0.5z + z2 = 7.25 Factor a perfect square on the left side: (z + 0.5)(z + 0.5) = 7.25 Calculate the square root of the right side: 2.692582404 Break this problem into two subproblems by setting (z + 0.5) equal to 2.692582404 and -2.692582404.Subproblem 1
z + 0.5 = 2.692582404 Simplifying z + 0.5 = 2.692582404 Reorder the terms: 0.5 + z = 2.692582404 Solving 0.5 + z = 2.692582404 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 = 2.692582404 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + z = 2.692582404 + -0.5 z = 2.692582404 + -0.5 Combine like terms: 2.692582404 + -0.5 = 2.192582404 z = 2.192582404 Simplifying z = 2.192582404Subproblem 2
z + 0.5 = -2.692582404 Simplifying z + 0.5 = -2.692582404 Reorder the terms: 0.5 + z = -2.692582404 Solving 0.5 + z = -2.692582404 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 = -2.692582404 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + z = -2.692582404 + -0.5 z = -2.692582404 + -0.5 Combine like terms: -2.692582404 + -0.5 = -3.192582404 z = -3.192582404 Simplifying z = -3.192582404Solution
The solution to the problem is based on the solutions from the subproblems. z = {2.192582404, -3.192582404}
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