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Simplifying 14z4 + -42z3 + 6z2 = 0 Reorder the terms: 6z2 + -42z3 + 14z4 = 0 Solving 6z2 + -42z3 + 14z4 = 0 Solving for variable 'z'. Factor out the Greatest Common Factor (GCF), '2z2'. 2z2(3 + -21z + 7z2) = 0 Ignore the factor 2.Subproblem 1
Set the factor 'z2' equal to zero and attempt to solve: Simplifying z2 = 0 Solving z2 = 0 Move all terms containing z to the left, all other terms to the right. Simplifying z2 = 0 Take the square root of each side: z = {0}Subproblem 2
Set the factor '(3 + -21z + 7z2)' equal to zero and attempt to solve: Simplifying 3 + -21z + 7z2 = 0 Solving 3 + -21z + 7z2 = 0 Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. 0.4285714286 + -3z + z2 = 0 Move the constant term to the right: Add '-0.4285714286' to each side of the equation. 0.4285714286 + -3z + -0.4285714286 + z2 = 0 + -0.4285714286 Reorder the terms: 0.4285714286 + -0.4285714286 + -3z + z2 = 0 + -0.4285714286 Combine like terms: 0.4285714286 + -0.4285714286 = 0.0000000000 0.0000000000 + -3z + z2 = 0 + -0.4285714286 -3z + z2 = 0 + -0.4285714286 Combine like terms: 0 + -0.4285714286 = -0.4285714286 -3z + z2 = -0.4285714286 The z term is -3z. Take half its coefficient (-1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. -3z + 2.25 + z2 = -0.4285714286 + 2.25 Reorder the terms: 2.25 + -3z + z2 = -0.4285714286 + 2.25 Combine like terms: -0.4285714286 + 2.25 = 1.8214285714 2.25 + -3z + z2 = 1.8214285714 Factor a perfect square on the left side: (z + -1.5)(z + -1.5) = 1.8214285714 Calculate the square root of the right side: 1.349603116 Break this problem into two subproblems by setting (z + -1.5) equal to 1.349603116 and -1.349603116.Subproblem 1
z + -1.5 = 1.349603116 Simplifying z + -1.5 = 1.349603116 Reorder the terms: -1.5 + z = 1.349603116 Solving -1.5 + z = 1.349603116 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + z = 1.349603116 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + z = 1.349603116 + 1.5 z = 1.349603116 + 1.5 Combine like terms: 1.349603116 + 1.5 = 2.849603116 z = 2.849603116 Simplifying z = 2.849603116Subproblem 2
z + -1.5 = -1.349603116 Simplifying z + -1.5 = -1.349603116 Reorder the terms: -1.5 + z = -1.349603116 Solving -1.5 + z = -1.349603116 Solving for variable 'z'. Move all terms containing z to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + z = -1.349603116 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + z = -1.349603116 + 1.5 z = -1.349603116 + 1.5 Combine like terms: -1.349603116 + 1.5 = 0.150396884 z = 0.150396884 Simplifying z = 0.150396884Solution
The solution to the problem is based on the solutions from the subproblems. z = {2.849603116, 0.150396884}Solution
z = {0, 2.849603116, 0.150396884}
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