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Simplifying 21z2 + -7z = 0 Reorder the terms: -7z + 21z2 = 0 Solving -7z + 21z2 = 0 Solving for variable 'z'. Factor out the Greatest Common Factor (GCF), '7z'. 7z(-1 + 3z) = 0 Ignore the factor 7.Subproblem 1
Set the factor 'z' equal to zero and attempt to solve: Simplifying z = 0 Solving z = 0 Move all terms containing z to the left, all other terms to the right. Simplifying z = 0Subproblem 2
Set the factor '(-1 + 3z)' equal to zero and attempt to solve: Simplifying -1 + 3z = 0 Solving -1 + 3z = 0 Move all terms containing z to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + 3z = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 3z = 0 + 1 3z = 0 + 1 Combine like terms: 0 + 1 = 1 3z = 1 Divide each side by '3'. z = 0.3333333333 Simplifying z = 0.3333333333Solution
z = {0, 0.3333333333}
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