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Simplifying 16x2 + 20x + 9 = 0 Reorder the terms: 9 + 20x + 16x2 = 0 Solving 9 + 20x + 16x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 16 the coefficient of the squared term: Divide each side by '16'. 0.5625 + 1.25x + x2 = 0 Move the constant term to the right: Add '-0.5625' to each side of the equation. 0.5625 + 1.25x + -0.5625 + x2 = 0 + -0.5625 Reorder the terms: 0.5625 + -0.5625 + 1.25x + x2 = 0 + -0.5625 Combine like terms: 0.5625 + -0.5625 = 0.0000 0.0000 + 1.25x + x2 = 0 + -0.5625 1.25x + x2 = 0 + -0.5625 Combine like terms: 0 + -0.5625 = -0.5625 1.25x + x2 = -0.5625 The x term is 1.25x. Take half its coefficient (0.625). Square it (0.390625) and add it to both sides. Add '0.390625' to each side of the equation. 1.25x + 0.390625 + x2 = -0.5625 + 0.390625 Reorder the terms: 0.390625 + 1.25x + x2 = -0.5625 + 0.390625 Combine like terms: -0.5625 + 0.390625 = -0.171875 0.390625 + 1.25x + x2 = -0.171875 Factor a perfect square on the left side: (x + 0.625)(x + 0.625) = -0.171875 Can't calculate square root of the right side. The solution to this equation could not be determined.
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