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Simplifying 3x + -2x2 = 28 Solving 3x + -2x2 = 28 Solving for variable 'x'. Reorder the terms: -28 + 3x + -2x2 = 28 + -28 Combine like terms: 28 + -28 = 0 -28 + 3x + -2x2 = 0 Begin completing the square. Divide all terms by -2 the coefficient of the squared term: Divide each side by '-2'. 14 + -1.5x + x2 = 0 Move the constant term to the right: Add '-14' to each side of the equation. 14 + -1.5x + -14 + x2 = 0 + -14 Reorder the terms: 14 + -14 + -1.5x + x2 = 0 + -14 Combine like terms: 14 + -14 = 0 0 + -1.5x + x2 = 0 + -14 -1.5x + x2 = 0 + -14 Combine like terms: 0 + -14 = -14 -1.5x + x2 = -14 The x term is -1.5x. Take half its coefficient (-0.75). Square it (0.5625) and add it to both sides. Add '0.5625' to each side of the equation. -1.5x + 0.5625 + x2 = -14 + 0.5625 Reorder the terms: 0.5625 + -1.5x + x2 = -14 + 0.5625 Combine like terms: -14 + 0.5625 = -13.4375 0.5625 + -1.5x + x2 = -13.4375 Factor a perfect square on the left side: (x + -0.75)(x + -0.75) = -13.4375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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