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Simplifying -1(2x2 + -5x + 5) = 0 Reorder the terms: -1(5 + -5x + 2x2) = 0 (5 * -1 + -5x * -1 + 2x2 * -1) = 0 (-5 + 5x + -2x2) = 0 Solving -5 + 5x + -2x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -2 the coefficient of the squared term: Divide each side by '-2'. 2.5 + -2.5x + x2 = 0 Move the constant term to the right: Add '-2.5' to each side of the equation. 2.5 + -2.5x + -2.5 + x2 = 0 + -2.5 Reorder the terms: 2.5 + -2.5 + -2.5x + x2 = 0 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + -2.5x + x2 = 0 + -2.5 -2.5x + x2 = 0 + -2.5 Combine like terms: 0 + -2.5 = -2.5 -2.5x + x2 = -2.5 The x term is -2.5x. Take half its coefficient (-1.25). Square it (1.5625) and add it to both sides. Add '1.5625' to each side of the equation. -2.5x + 1.5625 + x2 = -2.5 + 1.5625 Reorder the terms: 1.5625 + -2.5x + x2 = -2.5 + 1.5625 Combine like terms: -2.5 + 1.5625 = -0.9375 1.5625 + -2.5x + x2 = -0.9375 Factor a perfect square on the left side: (x + -1.25)(x + -1.25) = -0.9375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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