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Simplifying 72 + -1x + 10x2 = 0 Solving 72 + -1x + 10x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 10 the coefficient of the squared term: Divide each side by '10'. 7.2 + -0.1x + x2 = 0 Move the constant term to the right: Add '-7.2' to each side of the equation. 7.2 + -0.1x + -7.2 + x2 = 0 + -7.2 Reorder the terms: 7.2 + -7.2 + -0.1x + x2 = 0 + -7.2 Combine like terms: 7.2 + -7.2 = 0.0 0.0 + -0.1x + x2 = 0 + -7.2 -0.1x + x2 = 0 + -7.2 Combine like terms: 0 + -7.2 = -7.2 -0.1x + x2 = -7.2 The x term is -0.1x. Take half its coefficient (-0.05). Square it (0.0025) and add it to both sides. Add '0.0025' to each side of the equation. -0.1x + 0.0025 + x2 = -7.2 + 0.0025 Reorder the terms: 0.0025 + -0.1x + x2 = -7.2 + 0.0025 Combine like terms: -7.2 + 0.0025 = -7.1975 0.0025 + -0.1x + x2 = -7.1975 Factor a perfect square on the left side: (x + -0.05)(x + -0.05) = -7.1975 Can't calculate square root of the right side. The solution to this equation could not be determined.
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