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Simplifying 6 = -2x2 + -5x Reorder the terms: 6 = -5x + -2x2 Solving 6 = -5x + -2x2 Solving for variable 'x'. Reorder the terms: 6 + 5x + 2x2 = -5x + 5x + -2x2 + 2x2 Combine like terms: -5x + 5x = 0 6 + 5x + 2x2 = 0 + -2x2 + 2x2 6 + 5x + 2x2 = -2x2 + 2x2 Combine like terms: -2x2 + 2x2 = 0 6 + 5x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 3 + 2.5x + x2 = 0 Move the constant term to the right: Add '-3' to each side of the equation. 3 + 2.5x + -3 + x2 = 0 + -3 Reorder the terms: 3 + -3 + 2.5x + x2 = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 2.5x + x2 = 0 + -3 2.5x + x2 = 0 + -3 Combine like terms: 0 + -3 = -3 2.5x + x2 = -3 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 = -3 + 1.5625 Reorder the terms: 1.5625 + 2.5x + x2 = -3 + 1.5625 Combine like terms: -3 + 1.5625 = -1.4375 1.5625 + 2.5x + x2 = -1.4375 Factor a perfect square on the left side: (x + 1.25)(x + 1.25) = -1.4375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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