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Simplifying 5y2 + -64y + 220 = 0 Reorder the terms: 220 + -64y + 5y2 = 0 Solving 220 + -64y + 5y2 = 0 Solving for variable 'y'. Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. 44 + -12.8y + y2 = 0 Move the constant term to the right: Add '-44' to each side of the equation. 44 + -12.8y + -44 + y2 = 0 + -44 Reorder the terms: 44 + -44 + -12.8y + y2 = 0 + -44 Combine like terms: 44 + -44 = 0 0 + -12.8y + y2 = 0 + -44 -12.8y + y2 = 0 + -44 Combine like terms: 0 + -44 = -44 -12.8y + y2 = -44 The y term is -12.8y. Take half its coefficient (-6.4). Square it (40.96) and add it to both sides. Add '40.96' to each side of the equation. -12.8y + 40.96 + y2 = -44 + 40.96 Reorder the terms: 40.96 + -12.8y + y2 = -44 + 40.96 Combine like terms: -44 + 40.96 = -3.04 40.96 + -12.8y + y2 = -3.04 Factor a perfect square on the left side: (y + -6.4)(y + -6.4) = -3.04 Can't calculate square root of the right side. The solution to this equation could not be determined.
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