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Simplifying y2 + -10y + 28 = 0 Reorder the terms: 28 + -10y + y2 = 0 Solving 28 + -10y + y2 = 0 Solving for variable 'y'. Begin completing the square. Move the constant term to the right: Add '-28' to each side of the equation. 28 + -10y + -28 + y2 = 0 + -28 Reorder the terms: 28 + -28 + -10y + y2 = 0 + -28 Combine like terms: 28 + -28 = 0 0 + -10y + y2 = 0 + -28 -10y + y2 = 0 + -28 Combine like terms: 0 + -28 = -28 -10y + y2 = -28 The y term is -10y. Take half its coefficient (-5). Square it (25) and add it to both sides. Add '25' to each side of the equation. -10y + 25 + y2 = -28 + 25 Reorder the terms: 25 + -10y + y2 = -28 + 25 Combine like terms: -28 + 25 = -3 25 + -10y + y2 = -3 Factor a perfect square on the left side: (y + -5)(y + -5) = -3 Can't calculate square root of the right side. The solution to this equation could not be determined.
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