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Simplifying y2 + -2y = -100 Reorder the terms: -2y + y2 = -100 Solving -2y + y2 = -100 Solving for variable 'y'. Reorder the terms: 100 + -2y + y2 = -100 + 100 Combine like terms: -100 + 100 = 0 100 + -2y + y2 = 0 Begin completing the square. Move the constant term to the right: Add '-100' to each side of the equation. 100 + -2y + -100 + y2 = 0 + -100 Reorder the terms: 100 + -100 + -2y + y2 = 0 + -100 Combine like terms: 100 + -100 = 0 0 + -2y + y2 = 0 + -100 -2y + y2 = 0 + -100 Combine like terms: 0 + -100 = -100 -2y + y2 = -100 The y term is -2y. Take half its coefficient (-1). Square it (1) and add it to both sides. Add '1' to each side of the equation. -2y + 1 + y2 = -100 + 1 Reorder the terms: 1 + -2y + y2 = -100 + 1 Combine like terms: -100 + 1 = -99 1 + -2y + y2 = -99 Factor a perfect square on the left side: (y + -1)(y + -1) = -99 Can't calculate square root of the right side. The solution to this equation could not be determined.
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