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Simplifying 16z2 + -96z + 139 = 0 Reorder the terms: 139 + -96z + 16z2 = 0 Solving 139 + -96z + 16z2 = 0 Solving for variable 'z'. Begin completing the square. Divide all terms by 16 the coefficient of the squared term: Divide each side by '16'. 8.6875 + -6z + z2 = 0 Move the constant term to the right: Add '-8.6875' to each side of the equation. 8.6875 + -6z + -8.6875 + z2 = 0 + -8.6875 Reorder the terms: 8.6875 + -8.6875 + -6z + z2 = 0 + -8.6875 Combine like terms: 8.6875 + -8.6875 = 0.0000 0.0000 + -6z + z2 = 0 + -8.6875 -6z + z2 = 0 + -8.6875 Combine like terms: 0 + -8.6875 = -8.6875 -6z + z2 = -8.6875 The z term is -6z. Take half its coefficient (-3). Square it (9) and add it to both sides. Add '9' to each side of the equation. -6z + 9 + z2 = -8.6875 + 9 Reorder the terms: 9 + -6z + z2 = -8.6875 + 9 Combine like terms: -8.6875 + 9 = 0.3125 9 + -6z + z2 = 0.3125 Factor a perfect square on the left side: (z + -3)(z + -3) = 0.3125 Calculate the square root of the right side: 0.559016994 Break this problem into two subproblems by setting (z + -3) equal to 0.559016994 and -0.559016994.Subproblem 1
z + -3 = 0.559016994 Simplifying z + -3 = 0.559016994 Reorder the terms: -3 + z = 0.559016994 Solving -3 + z = 0.559016994 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + z = 0.559016994 + 3 Combine like terms: -3 + 3 = 0 0 + z = 0.559016994 + 3 z = 0.559016994 + 3 Combine like terms: 0.559016994 + 3 = 3.559016994 z = 3.559016994 Simplifying z = 3.559016994Subproblem 2
z + -3 = -0.559016994 Simplifying z + -3 = -0.559016994 Reorder the terms: -3 + z = -0.559016994 Solving -3 + z = -0.559016994 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + z = -0.559016994 + 3 Combine like terms: -3 + 3 = 0 0 + z = -0.559016994 + 3 z = -0.559016994 + 3 Combine like terms: -0.559016994 + 3 = 2.440983006 z = 2.440983006 Simplifying z = 2.440983006Solution
The solution to the problem is based on the solutions from the subproblems. z = {3.559016994, 2.440983006}
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