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Simplifying y2 + -16y + 64 + 81 = 0 Reorder the terms: 64 + 81 + -16y + y2 = 0 Combine like terms: 64 + 81 = 145 145 + -16y + y2 = 0 Solving 145 + -16y + y2 = 0 Solving for variable 'y'. Begin completing the square. Move the constant term to the right: Add '-145' to each side of the equation. 145 + -16y + -145 + y2 = 0 + -145 Reorder the terms: 145 + -145 + -16y + y2 = 0 + -145 Combine like terms: 145 + -145 = 0 0 + -16y + y2 = 0 + -145 -16y + y2 = 0 + -145 Combine like terms: 0 + -145 = -145 -16y + y2 = -145 The y term is -16y. Take half its coefficient (-8). Square it (64) and add it to both sides. Add '64' to each side of the equation. -16y + 64 + y2 = -145 + 64 Reorder the terms: 64 + -16y + y2 = -145 + 64 Combine like terms: -145 + 64 = -81 64 + -16y + y2 = -81 Factor a perfect square on the left side: (y + -8)(y + -8) = -81 Can't calculate square root of the right side. The solution to this equation could not be determined.
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