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Simplifying 7.2x2 + -28x + 28 = 0 Reorder the terms: 28 + -28x + 7.2x2 = 0 Solving 28 + -28x + 7.2x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 7.2 the coefficient of the squared term: Divide each side by '7.2'. 3.888888889 + -3.888888889x + x2 = 0 Move the constant term to the right: Add '-3.888888889' to each side of the equation. 3.888888889 + -3.888888889x + -3.888888889 + x2 = 0 + -3.888888889 Reorder the terms: 3.888888889 + -3.888888889 + -3.888888889x + x2 = 0 + -3.888888889 Combine like terms: 3.888888889 + -3.888888889 = 0.000000000 0.000000000 + -3.888888889x + x2 = 0 + -3.888888889 -3.888888889x + x2 = 0 + -3.888888889 Combine like terms: 0 + -3.888888889 = -3.888888889 -3.888888889x + x2 = -3.888888889 The x term is -3.888888889x. Take half its coefficient (-1.944444445). Square it (3.780864200) and add it to both sides. Add '3.780864200' to each side of the equation. -3.888888889x + 3.780864200 + x2 = -3.888888889 + 3.780864200 Reorder the terms: 3.780864200 + -3.888888889x + x2 = -3.888888889 + 3.780864200 Combine like terms: -3.888888889 + 3.780864200 = -0.108024689 3.780864200 + -3.888888889x + x2 = -0.108024689 Factor a perfect square on the left side: (x + -1.944444445)(x + -1.944444445) = -0.108024689 Can't calculate square root of the right side. The solution to this equation could not be determined.
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