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Simplifying y2 + y + 0.7 = 0 Reorder the terms: 0.7 + y + y2 = 0 Solving 0.7 + y + y2 = 0 Solving for variable 'y'. Begin completing the square. Move the constant term to the right: Add '-0.7' to each side of the equation. 0.7 + y + -0.7 + y2 = 0 + -0.7 Reorder the terms: 0.7 + -0.7 + y + y2 = 0 + -0.7 Combine like terms: 0.7 + -0.7 = 0.0 0.0 + y + y2 = 0 + -0.7 y + y2 = 0 + -0.7 Combine like terms: 0 + -0.7 = -0.7 y + y2 = -0.7 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. y + 0.25 + y2 = -0.7 + 0.25 Reorder the terms: 0.25 + y + y2 = -0.7 + 0.25 Combine like terms: -0.7 + 0.25 = -0.45 0.25 + y + y2 = -0.45 Factor a perfect square on the left side: (y + 0.5)(y + 0.5) = -0.45 Can't calculate square root of the right side. The solution to this equation could not be determined.
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