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Simplifying 12x2 + 30x + 31 = 0 Reorder the terms: 31 + 30x + 12x2 = 0 Solving 31 + 30x + 12x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 12 the coefficient of the squared term: Divide each side by '12'. 2.583333333 + 2.5x + x2 = 0 Move the constant term to the right: Add '-2.583333333' to each side of the equation. 2.583333333 + 2.5x + -2.583333333 + x2 = 0 + -2.583333333 Reorder the terms: 2.583333333 + -2.583333333 + 2.5x + x2 = 0 + -2.583333333 Combine like terms: 2.583333333 + -2.583333333 = 0.000000000 0.000000000 + 2.5x + x2 = 0 + -2.583333333 2.5x + x2 = 0 + -2.583333333 Combine like terms: 0 + -2.583333333 = -2.583333333 2.5x + x2 = -2.583333333 The x term is 2.5x. Take half its coefficient (1.25). Square it (1.5625) and add it to both sides. Add '1.5625' to each side of the equation. 2.5x + 1.5625 + x2 = -2.583333333 + 1.5625 Reorder the terms: 1.5625 + 2.5x + x2 = -2.583333333 + 1.5625 Combine like terms: -2.583333333 + 1.5625 = -1.020833333 1.5625 + 2.5x + x2 = -1.020833333 Factor a perfect square on the left side: (x + 1.25)(x + 1.25) = -1.020833333 Can't calculate square root of the right side. The solution to this equation could not be determined.
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