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Simplifying 20x2 + 10x + 9 = 0 Reorder the terms: 9 + 10x + 20x2 = 0 Solving 9 + 10x + 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'. 0.45 + 0.5x + x2 = 0 Move the constant term to the right: Add '-0.45' to each side of the equation. 0.45 + 0.5x + -0.45 + x2 = 0 + -0.45 Reorder the terms: 0.45 + -0.45 + 0.5x + x2 = 0 + -0.45 Combine like terms: 0.45 + -0.45 = 0.00 0.00 + 0.5x + x2 = 0 + -0.45 0.5x + x2 = 0 + -0.45 Combine like terms: 0 + -0.45 = -0.45 0.5x + x2 = -0.45 The x term is 0.5x. Take half its coefficient (0.25). Square it (0.0625) and add it to both sides. Add '0.0625' to each side of the equation. 0.5x + 0.0625 + x2 = -0.45 + 0.0625 Reorder the terms: 0.0625 + 0.5x + x2 = -0.45 + 0.0625 Combine like terms: -0.45 + 0.0625 = -0.3875 0.0625 + 0.5x + x2 = -0.3875 Factor a perfect square on the left side: (x + 0.25)(x + 0.25) = -0.3875 Can't calculate square root of the right side. The solution to this equation could not be determined.
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