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Simplifying 3 + -9x2 + 28x + -30 = 0 Reorder the terms: 3 + -30 + 28x + -9x2 = 0 Combine like terms: 3 + -30 = -27 -27 + 28x + -9x2 = 0 Solving -27 + 28x + -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'. 3 + -3.111111111x + x2 = 0 Move the constant term to the right: Add '-3' to each side of the equation. 3 + -3.111111111x + -3 + x2 = 0 + -3 Reorder the terms: 3 + -3 + -3.111111111x + x2 = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -3.111111111x + x2 = 0 + -3 -3.111111111x + x2 = 0 + -3 Combine like terms: 0 + -3 = -3 -3.111111111x + x2 = -3 The x term is -3.111111111x. Take half its coefficient (-1.555555556). Square it (2.419753088) and add it to both sides. Add '2.419753088' to each side of the equation. -3.111111111x + 2.419753088 + x2 = -3 + 2.419753088 Reorder the terms: 2.419753088 + -3.111111111x + x2 = -3 + 2.419753088 Combine like terms: -3 + 2.419753088 = -0.580246912 2.419753088 + -3.111111111x + x2 = -0.580246912 Factor a perfect square on the left side: (x + -1.555555556)(x + -1.555555556) = -0.580246912 Can't calculate square root of the right side. The solution to this equation could not be determined.
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