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Simplifying 2x2 + 12x + 43 = 0 Reorder the terms: 43 + 12x + 2x2 = 0 Solving 43 + 12x + 2x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 21.5 + 6x + x2 = 0 Move the constant term to the right: Add '-21.5' to each side of the equation. 21.5 + 6x + -21.5 + x2 = 0 + -21.5 Reorder the terms: 21.5 + -21.5 + 6x + x2 = 0 + -21.5 Combine like terms: 21.5 + -21.5 = 0.0 0.0 + 6x + x2 = 0 + -21.5 6x + x2 = 0 + -21.5 Combine like terms: 0 + -21.5 = -21.5 6x + x2 = -21.5 The x term is 6x. Take half its coefficient (3). Square it (9) and add it to both sides. Add '9' to each side of the equation. 6x + 9 + x2 = -21.5 + 9 Reorder the terms: 9 + 6x + x2 = -21.5 + 9 Combine like terms: -21.5 + 9 = -12.5 9 + 6x + x2 = -12.5 Factor a perfect square on the left side: (x + 3)(x + 3) = -12.5 Can't calculate square root of the right side. The solution to this equation could not be determined.
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