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Simplifying y(y + 1) = 0.75 Reorder the terms: y(1 + y) = 0.75 (1 * y + y * y) = 0.75 (1y + y2) = 0.75 Solving 1y + y2 = 0.75 Solving for variable 'y'. Reorder the terms: -0.75 + 1y + y2 = 0.75 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 -0.75 + 1y + y2 = 0.00 Begin completing the square. Move the constant term to the right: Add '0.75' to each side of the equation. -0.75 + 1y + 0.75 + y2 = 0.00 + 0.75 Reorder the terms: -0.75 + 0.75 + 1y + y2 = 0.00 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + 1y + y2 = 0.00 + 0.75 1y + y2 = 0.00 + 0.75 Combine like terms: 0.00 + 0.75 = 0.75 1y + y2 = 0.75 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. y + 0.25 + y2 = 0.75 + 0.25 Reorder the terms: 0.25 + y + y2 = 0.75 + 0.25 Combine like terms: 0.75 + 0.25 = 1 0.25 + y + y2 = 1 Factor a perfect square on the left side: (y + 0.5)(y + 0.5) = 1 Calculate the square root of the right side: 1 Break this problem into two subproblems by setting (y + 0.5) equal to 1 and -1.Subproblem 1
y + 0.5 = 1 Simplifying y + 0.5 = 1 Reorder the terms: 0.5 + y = 1 Solving 0.5 + y = 1 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 = 1 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y = 1 + -0.5 y = 1 + -0.5 Combine like terms: 1 + -0.5 = 0.5 y = 0.5 Simplifying y = 0.5Subproblem 2
y + 0.5 = -1 Simplifying y + 0.5 = -1 Reorder the terms: 0.5 + y = -1 Solving 0.5 + y = -1 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 = -1 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y = -1 + -0.5 y = -1 + -0.5 Combine like terms: -1 + -0.5 = -1.5 y = -1.5 Simplifying y = -1.5Solution
The solution to the problem is based on the solutions from the subproblems. y = {0.5, -1.5}
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