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Simplifying -1y2 + 3y = 28 Reorder the terms: 3y + -1y2 = 28 Solving 3y + -1y2 = 28 Solving for variable 'y'. Reorder the terms: -28 + 3y + -1y2 = 28 + -28 Combine like terms: 28 + -28 = 0 -28 + 3y + -1y2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 28 + -3y + y2 = 0 Move the constant term to the right: Add '-28' to each side of the equation. 28 + -3y + -28 + y2 = 0 + -28 Reorder the terms: 28 + -28 + -3y + y2 = 0 + -28 Combine like terms: 28 + -28 = 0 0 + -3y + y2 = 0 + -28 -3y + y2 = 0 + -28 Combine like terms: 0 + -28 = -28 -3y + y2 = -28 The y term is -3y. Take half its coefficient (-1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. -3y + 2.25 + y2 = -28 + 2.25 Reorder the terms: 2.25 + -3y + y2 = -28 + 2.25 Combine like terms: -28 + 2.25 = -25.75 2.25 + -3y + y2 = -25.75 Factor a perfect square on the left side: (y + -1.5)(y + -1.5) = -25.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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