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Simplifying 9x2 + -36x + 80 = 0 Reorder the terms: 80 + -36x + 9x2 = 0 Solving 80 + -36x + 9x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 9 the coefficient of the squared term: Divide each side by '9'. 8.888888889 + -4x + x2 = 0 Move the constant term to the right: Add '-8.888888889' to each side of the equation. 8.888888889 + -4x + -8.888888889 + x2 = 0 + -8.888888889 Reorder the terms: 8.888888889 + -8.888888889 + -4x + x2 = 0 + -8.888888889 Combine like terms: 8.888888889 + -8.888888889 = 0.000000000 0.000000000 + -4x + x2 = 0 + -8.888888889 -4x + x2 = 0 + -8.888888889 Combine like terms: 0 + -8.888888889 = -8.888888889 -4x + x2 = -8.888888889 The x term is -4x. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4x + 4 + x2 = -8.888888889 + 4 Reorder the terms: 4 + -4x + x2 = -8.888888889 + 4 Combine like terms: -8.888888889 + 4 = -4.888888889 4 + -4x + x2 = -4.888888889 Factor a perfect square on the left side: (x + -2)(x + -2) = -4.888888889 Can't calculate square root of the right side. The solution to this equation could not be determined.
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