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Simplifying -1x + 4x(x + 3) = -12 Reorder the terms: -1x + 4x(3 + x) = -12 -1x + (3 * 4x + x * 4x) = -12 -1x + (12x + 4x2) = -12 Combine like terms: -1x + 12x = 11x 11x + 4x2 = -12 Solving 11x + 4x2 = -12 Solving for variable 'x'. Reorder the terms: 12 + 11x + 4x2 = -12 + 12 Combine like terms: -12 + 12 = 0 12 + 11x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 3 + 2.75x + x2 = 0 Move the constant term to the right: Add '-3' to each side of the equation. 3 + 2.75x + -3 + x2 = 0 + -3 Reorder the terms: 3 + -3 + 2.75x + x2 = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 2.75x + x2 = 0 + -3 2.75x + x2 = 0 + -3 Combine like terms: 0 + -3 = -3 2.75x + x2 = -3 The x term is 2.75x. Take half its coefficient (1.375). Square it (1.890625) and add it to both sides. Add '1.890625' to each side of the equation. 2.75x + 1.890625 + x2 = -3 + 1.890625 Reorder the terms: 1.890625 + 2.75x + x2 = -3 + 1.890625 Combine like terms: -3 + 1.890625 = -1.109375 1.890625 + 2.75x + x2 = -1.109375 Factor a perfect square on the left side: (x + 1.375)(x + 1.375) = -1.109375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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