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Simplifying 4y(y + -1) = -19 Reorder the terms: 4y(-1 + y) = -19 (-1 * 4y + y * 4y) = -19 (-4y + 4y2) = -19 Solving -4y + 4y2 = -19 Solving for variable 'y'. Reorder the terms: 19 + -4y + 4y2 = -19 + 19 Combine like terms: -19 + 19 = 0 19 + -4y + 4y2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 4.75 + -1y + y2 = 0 Move the constant term to the right: Add '-4.75' to each side of the equation. 4.75 + -1y + -4.75 + y2 = 0 + -4.75 Reorder the terms: 4.75 + -4.75 + -1y + y2 = 0 + -4.75 Combine like terms: 4.75 + -4.75 = 0.00 0.00 + -1y + y2 = 0 + -4.75 -1y + y2 = 0 + -4.75 Combine like terms: 0 + -4.75 = -4.75 -1y + y2 = -4.75 The y term is -1y. 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 = -4.75 + 0.25 Reorder the terms: 0.25 + -1y + y2 = -4.75 + 0.25 Combine like terms: -4.75 + 0.25 = -4.5 0.25 + -1y + y2 = -4.5 Factor a perfect square on the left side: (y + -0.5)(y + -0.5) = -4.5 Can't calculate square root of the right side. The solution to this equation could not be determined.
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