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Simplifying y2 + -9y + 30 = 0 Reorder the terms: 30 + -9y + y2 = 0 Solving 30 + -9y + y2 = 0 Solving for variable 'y'. Begin completing the square. Move the constant term to the right: Add '-30' to each side of the equation. 30 + -9y + -30 + y2 = 0 + -30 Reorder the terms: 30 + -30 + -9y + y2 = 0 + -30 Combine like terms: 30 + -30 = 0 0 + -9y + y2 = 0 + -30 -9y + y2 = 0 + -30 Combine like terms: 0 + -30 = -30 -9y + y2 = -30 The y term is -9y. Take half its coefficient (-4.5). Square it (20.25) and add it to both sides. Add '20.25' to each side of the equation. -9y + 20.25 + y2 = -30 + 20.25 Reorder the terms: 20.25 + -9y + y2 = -30 + 20.25 Combine like terms: -30 + 20.25 = -9.75 20.25 + -9y + y2 = -9.75 Factor a perfect square on the left side: (y + -4.5)(y + -4.5) = -9.75 Can't calculate square root of the right side. The solution to this equation could not be determined.
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