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Simplifying 20x2 + 5x + 8 = 0 Reorder the terms: 8 + 5x + 20x2 = 0 Solving 8 + 5x + 20x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 20 the coefficient of the squared term: Divide each side by '20'. 0.4 + 0.25x + x2 = 0 Move the constant term to the right: Add '-0.4' to each side of the equation. 0.4 + 0.25x + -0.4 + x2 = 0 + -0.4 Reorder the terms: 0.4 + -0.4 + 0.25x + x2 = 0 + -0.4 Combine like terms: 0.4 + -0.4 = 0.0 0.0 + 0.25x + x2 = 0 + -0.4 0.25x + x2 = 0 + -0.4 Combine like terms: 0 + -0.4 = -0.4 0.25x + x2 = -0.4 The x term is 0.25x. Take half its coefficient (0.125). Square it (0.015625) and add it to both sides. Add '0.015625' to each side of the equation. 0.25x + 0.015625 + x2 = -0.4 + 0.015625 Reorder the terms: 0.015625 + 0.25x + x2 = -0.4 + 0.015625 Combine like terms: -0.4 + 0.015625 = -0.384375 0.015625 + 0.25x + x2 = -0.384375 Factor a perfect square on the left side: (x + 0.125)(x + 0.125) = -0.384375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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