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Simplifying 4y2 + -11y + 21 = 0 Reorder the terms: 21 + -11y + 4y2 = 0 Solving 21 + -11y + 4y2 = 0 Solving for variable 'y'. Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 5.25 + -2.75y + y2 = 0 Move the constant term to the right: Add '-5.25' to each side of the equation. 5.25 + -2.75y + -5.25 + y2 = 0 + -5.25 Reorder the terms: 5.25 + -5.25 + -2.75y + y2 = 0 + -5.25 Combine like terms: 5.25 + -5.25 = 0.00 0.00 + -2.75y + y2 = 0 + -5.25 -2.75y + y2 = 0 + -5.25 Combine like terms: 0 + -5.25 = -5.25 -2.75y + y2 = -5.25 The y term is -2.75y. Take half its coefficient (-1.375). Square it (1.890625) and add it to both sides. Add '1.890625' to each side of the equation. -2.75y + 1.890625 + y2 = -5.25 + 1.890625 Reorder the terms: 1.890625 + -2.75y + y2 = -5.25 + 1.890625 Combine like terms: -5.25 + 1.890625 = -3.359375 1.890625 + -2.75y + y2 = -3.359375 Factor a perfect square on the left side: (y + -1.375)(y + -1.375) = -3.359375 Can't calculate square root of the right side. The solution to this equation could not be determined.
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