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Simplifying 9z(z + 2) + -1a(z + -2) = 0 Reorder the terms: 9z(2 + z) + -1a(z + -2) = 0 (2 * 9z + z * 9z) + -1a(z + -2) = 0 (18z + 9z2) + -1a(z + -2) = 0 Reorder the terms: 18z + 9z2 + -1a(-2 + z) = 0 18z + 9z2 + (-2 * -1a + z * -1a) = 0 18z + 9z2 + (2a + -1az) = 0 Reorder the terms: 2a + -1az + 18z + 9z2 = 0 Solving 2a + -1az + 18z + 9z2 = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-18z' to each side of the equation. 2a + -1az + 18z + -18z + 9z2 = 0 + -18z Combine like terms: 18z + -18z = 0 2a + -1az + 0 + 9z2 = 0 + -18z 2a + -1az + 9z2 = 0 + -18z Remove the zero: 2a + -1az + 9z2 = -18z Add '-9z2' to each side of the equation. 2a + -1az + 9z2 + -9z2 = -18z + -9z2 Combine like terms: 9z2 + -9z2 = 0 2a + -1az + 0 = -18z + -9z2 2a + -1az = -18z + -9z2 Reorder the terms: 2a + -1az + 18z + 9z2 = -18z + 18z + -9z2 + 9z2 Combine like terms: -18z + 18z = 0 2a + -1az + 18z + 9z2 = 0 + -9z2 + 9z2 2a + -1az + 18z + 9z2 = -9z2 + 9z2 Combine like terms: -9z2 + 9z2 = 0 2a + -1az + 18z + 9z2 = 0 The solution to this equation could not be determined.
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