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Simplifying (Z + -9)(z + 9) = 0 Reorder the terms: (-9 + Z)(z + 9) = 0 Reorder the terms: (-9 + Z)(9 + z) = 0 Multiply (-9 + Z) * (9 + z) (-9(9 + z) + Z(9 + z)) = 0 ((9 * -9 + z * -9) + Z(9 + z)) = 0 ((-81 + -9z) + Z(9 + z)) = 0 (-81 + -9z + (9 * Z + z * Z)) = 0 (-81 + -9z + (9Z + zZ)) = 0 Reorder the terms: (-81 + 9Z + -9z + zZ) = 0 (-81 + 9Z + -9z + zZ) = 0 Solving -81 + 9Z + -9z + zZ = 0 Solving for variable 'Z'. Move all terms containing Z to the left, all other terms to the right. Add '81' to each side of the equation. -81 + 9Z + -9z + 81 + zZ = 0 + 81 Reorder the terms: -81 + 81 + 9Z + -9z + zZ = 0 + 81 Combine like terms: -81 + 81 = 0 0 + 9Z + -9z + zZ = 0 + 81 9Z + -9z + zZ = 0 + 81 Combine like terms: 0 + 81 = 81 9Z + -9z + zZ = 81 Add '9z' to each side of the equation. 9Z + -9z + 9z + zZ = 81 + 9z Combine like terms: -9z + 9z = 0 9Z + 0 + zZ = 81 + 9z 9Z + zZ = 81 + 9z Reorder the terms: -81 + 9Z + -9z + zZ = 81 + 9z + -81 + -9z Reorder the terms: -81 + 9Z + -9z + zZ = 81 + -81 + 9z + -9z Combine like terms: 81 + -81 = 0 -81 + 9Z + -9z + zZ = 0 + 9z + -9z -81 + 9Z + -9z + zZ = 9z + -9z Combine like terms: 9z + -9z = 0 -81 + 9Z + -9z + zZ = 0 The solution to this equation could not be determined.
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