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Simplifying (a + 9)(a2 + -9a + 81) = 0 Reorder the terms: (9 + a)(a2 + -9a + 81) = 0 Reorder the terms: (9 + a)(81 + -9a + a2) = 0 Multiply (9 + a) * (81 + -9a + a2) (9(81 + -9a + a2) + a(81 + -9a + a2)) = 0 ((81 * 9 + -9a * 9 + a2 * 9) + a(81 + -9a + a2)) = 0 ((729 + -81a + 9a2) + a(81 + -9a + a2)) = 0 (729 + -81a + 9a2 + (81 * a + -9a * a + a2 * a)) = 0 (729 + -81a + 9a2 + (81a + -9a2 + a3)) = 0 Reorder the terms: (729 + -81a + 81a + 9a2 + -9a2 + a3) = 0 Combine like terms: -81a + 81a = 0 (729 + 0 + 9a2 + -9a2 + a3) = 0 (729 + 9a2 + -9a2 + a3) = 0 Combine like terms: 9a2 + -9a2 = 0 (729 + 0 + a3) = 0 (729 + a3) = 0 Solving 729 + a3 = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-729' to each side of the equation. 729 + -729 + a3 = 0 + -729 Combine like terms: 729 + -729 = 0 0 + a3 = 0 + -729 a3 = 0 + -729 Combine like terms: 0 + -729 = -729 a3 = -729 Simplifying a3 = -729 Reorder the terms: 729 + a3 = -729 + 729 Combine like terms: -729 + 729 = 0 729 + a3 = 0 The solution to this equation could not be determined.
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