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Simplifying (z + 3)(z + 7)(z + -9) = 0 Reorder the terms: (3 + z)(z + 7)(z + -9) = 0 Reorder the terms: (3 + z)(7 + z)(z + -9) = 0 Reorder the terms: (3 + z)(7 + z)(-9 + z) = 0 Multiply (3 + z) * (7 + z) (3(7 + z) + z(7 + z))(-9 + z) = 0 ((7 * 3 + z * 3) + z(7 + z))(-9 + z) = 0 ((21 + 3z) + z(7 + z))(-9 + z) = 0 (21 + 3z + (7 * z + z * z))(-9 + z) = 0 (21 + 3z + (7z + z2))(-9 + z) = 0 Combine like terms: 3z + 7z = 10z (21 + 10z + z2)(-9 + z) = 0 Multiply (21 + 10z + z2) * (-9 + z) (21(-9 + z) + 10z * (-9 + z) + z2(-9 + z)) = 0 ((-9 * 21 + z * 21) + 10z * (-9 + z) + z2(-9 + z)) = 0 ((-189 + 21z) + 10z * (-9 + z) + z2(-9 + z)) = 0 (-189 + 21z + (-9 * 10z + z * 10z) + z2(-9 + z)) = 0 (-189 + 21z + (-90z + 10z2) + z2(-9 + z)) = 0 (-189 + 21z + -90z + 10z2 + (-9 * z2 + z * z2)) = 0 (-189 + 21z + -90z + 10z2 + (-9z2 + z3)) = 0 Combine like terms: 21z + -90z = -69z (-189 + -69z + 10z2 + -9z2 + z3) = 0 Combine like terms: 10z2 + -9z2 = 1z2 (-189 + -69z + 1z2 + z3) = 0 Solving -189 + -69z + 1z2 + z3 = 0 Solving for variable 'z'. The solution to this equation could not be determined.
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