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Simplifying y + -1y2 = 18 Solving y + -1y2 = 18 Solving for variable 'y'. Reorder the terms: -18 + y + -1y2 = 18 + -18 Combine like terms: 18 + -18 = 0 -18 + y + -1y2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 18 + -1y + y2 = 0 Move the constant term to the right: Add '-18' to each side of the equation. 18 + -1y + -18 + y2 = 0 + -18 Reorder the terms: 18 + -18 + -1y + y2 = 0 + -18 Combine like terms: 18 + -18 = 0 0 + -1y + y2 = 0 + -18 -1y + y2 = 0 + -18 Combine like terms: 0 + -18 = -18 -1y + y2 = -18 The y term is y. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. -1y + 0.25 + y2 = -18 + 0.25 Reorder the terms: 0.25 + -1y + y2 = -18 + 0.25 Combine like terms: -18 + 0.25 = -17.75 0.25 + -1y + y2 = -17.75 Factor a perfect square on the left side: (y + 0.5)(y + 0.5) = -17.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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