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Simplifying 8x2 + x + 9 = 0 Reorder the terms: 9 + x + 8x2 = 0 Solving 9 + x + 8x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 8 the coefficient of the squared term: Divide each side by '8'. 1.125 + 0.125x + x2 = 0 Move the constant term to the right: Add '-1.125' to each side of the equation. 1.125 + 0.125x + -1.125 + x2 = 0 + -1.125 Reorder the terms: 1.125 + -1.125 + 0.125x + x2 = 0 + -1.125 Combine like terms: 1.125 + -1.125 = 0.000 0.000 + 0.125x + x2 = 0 + -1.125 0.125x + x2 = 0 + -1.125 Combine like terms: 0 + -1.125 = -1.125 0.125x + x2 = -1.125 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. 0.125x + 0.25 + x2 = -1.125 + 0.25 Reorder the terms: 0.25 + 0.125x + x2 = -1.125 + 0.25 Combine like terms: -1.125 + 0.25 = -0.875 0.25 + 0.125x + x2 = -0.875 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = -0.875 Can't calculate square root of the right side. The solution to this equation could not be determined.
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