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Simplifying y2 + -1y + -4 = 0 Reorder the terms: -4 + -1y + y2 = 0 Solving -4 + -1y + y2 = 0 Solving for variable 'y'. Begin completing the square. Move the constant term to the right: Add '4' to each side of the equation. -4 + -1y + 4 + y2 = 0 + 4 Reorder the terms: -4 + 4 + -1y + y2 = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1y + y2 = 0 + 4 -1y + y2 = 0 + 4 Combine like terms: 0 + 4 = 4 -1y + y2 = 4 The y term is -1y. 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. -1y + 0.25 + y2 = 4 + 0.25 Reorder the terms: 0.25 + -1y + y2 = 4 + 0.25 Combine like terms: 4 + 0.25 = 4.25 0.25 + -1y + y2 = 4.25 Factor a perfect square on the left side: (y + -0.5)(y + -0.5) = 4.25 Calculate the square root of the right side: 2.061552813 Break this problem into two subproblems by setting (y + -0.5) equal to 2.061552813 and -2.061552813.Subproblem 1
y + -0.5 = 2.061552813 Simplifying y + -0.5 = 2.061552813 Reorder the terms: -0.5 + y = 2.061552813 Solving -0.5 + y = 2.061552813 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + y = 2.061552813 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + y = 2.061552813 + 0.5 y = 2.061552813 + 0.5 Combine like terms: 2.061552813 + 0.5 = 2.561552813 y = 2.561552813 Simplifying y = 2.561552813Subproblem 2
y + -0.5 = -2.061552813 Simplifying y + -0.5 = -2.061552813 Reorder the terms: -0.5 + y = -2.061552813 Solving -0.5 + y = -2.061552813 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + y = -2.061552813 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + y = -2.061552813 + 0.5 y = -2.061552813 + 0.5 Combine like terms: -2.061552813 + 0.5 = -1.561552813 y = -1.561552813 Simplifying y = -1.561552813Solution
The solution to the problem is based on the solutions from the subproblems. y = {2.561552813, -1.561552813}
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