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Simplifying 90x2 + x + 91 = 0 Reorder the terms: 91 + x + 90x2 = 0 Solving 91 + x + 90x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 90 the coefficient of the squared term: Divide each side by '90'. 1.011111111 + 0.01111111111x + x2 = 0 Move the constant term to the right: Add '-1.011111111' to each side of the equation. 1.011111111 + 0.01111111111x + -1.011111111 + x2 = 0 + -1.011111111 Reorder the terms: 1.011111111 + -1.011111111 + 0.01111111111x + x2 = 0 + -1.011111111 Combine like terms: 1.011111111 + -1.011111111 = 0.000000000 0.000000000 + 0.01111111111x + x2 = 0 + -1.011111111 0.01111111111x + x2 = 0 + -1.011111111 Combine like terms: 0 + -1.011111111 = -1.011111111 0.01111111111x + x2 = -1.011111111 The x term is x. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. 0.01111111111x + 0.25 + x2 = -1.011111111 + 0.25 Reorder the terms: 0.25 + 0.01111111111x + x2 = -1.011111111 + 0.25 Combine like terms: -1.011111111 + 0.25 = -0.761111111 0.25 + 0.01111111111x + x2 = -0.761111111 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = -0.761111111 Can't calculate square root of the right side. The solution to this equation could not be determined.
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