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Simplifying 9x2 + 3x + 6x + 8 = 0 Reorder the terms: 8 + 3x + 6x + 9x2 = 0 Combine like terms: 3x + 6x = 9x 8 + 9x + 9x2 = 0 Solving 8 + 9x + 9x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 9 the coefficient of the squared term: Divide each side by '9'. 0.8888888889 + x + x2 = 0 Move the constant term to the right: Add '-0.8888888889' to each side of the equation. 0.8888888889 + x + -0.8888888889 + x2 = 0 + -0.8888888889 Reorder the terms: 0.8888888889 + -0.8888888889 + x + x2 = 0 + -0.8888888889 Combine like terms: 0.8888888889 + -0.8888888889 = 0.0000000000 0.0000000000 + x + x2 = 0 + -0.8888888889 x + x2 = 0 + -0.8888888889 Combine like terms: 0 + -0.8888888889 = -0.8888888889 x + x2 = -0.8888888889 The x term is x. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. + 0.25 + x2 = -0.8888888889 + 0.25 Combine like terms: + 0.25 = 1.25 1.25 + x2 = -0.8888888889 + 0.25 Combine like terms: -0.8888888889 + 0.25 = -0.6388888889 1.25 + x2 = -0.6388888889 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = -0.6388888889 Can't calculate square root of the right side. The solution to this equation could not be determined.
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