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Simplifying 4x2 + -20x + 57 = 0 Reorder the terms: 57 + -20x + 4x2 = 0 Solving 57 + -20x + 4x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 14.25 + -5x + x2 = 0 Move the constant term to the right: Add '-14.25' to each side of the equation. 14.25 + -5x + -14.25 + x2 = 0 + -14.25 Reorder the terms: 14.25 + -14.25 + -5x + x2 = 0 + -14.25 Combine like terms: 14.25 + -14.25 = 0.00 0.00 + -5x + x2 = 0 + -14.25 -5x + x2 = 0 + -14.25 Combine like terms: 0 + -14.25 = -14.25 -5x + x2 = -14.25 The x term is -5x. Take half its coefficient (-2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. -5x + 6.25 + x2 = -14.25 + 6.25 Reorder the terms: 6.25 + -5x + x2 = -14.25 + 6.25 Combine like terms: -14.25 + 6.25 = -8 6.25 + -5x + x2 = -8 Factor a perfect square on the left side: (x + -2.5)(x + -2.5) = -8 Can't calculate square root of the right side. The solution to this equation could not be determined.
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