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Simplifying 8y2 + 12y + -5 = 0 Reorder the terms: -5 + 12y + 8y2 = 0 Solving -5 + 12y + 8y2 = 0 Solving for variable 'y'. Begin completing the square. Divide all terms by 8 the coefficient of the squared term: Divide each side by '8'. -0.625 + 1.5y + y2 = 0 Move the constant term to the right: Add '0.625' to each side of the equation. -0.625 + 1.5y + 0.625 + y2 = 0 + 0.625 Reorder the terms: -0.625 + 0.625 + 1.5y + y2 = 0 + 0.625 Combine like terms: -0.625 + 0.625 = 0.000 0.000 + 1.5y + y2 = 0 + 0.625 1.5y + y2 = 0 + 0.625 Combine like terms: 0 + 0.625 = 0.625 1.5y + y2 = 0.625 The y term is 1.5y. Take half its coefficient (0.75). Square it (0.5625) and add it to both sides. Add '0.5625' to each side of the equation. 1.5y + 0.5625 + y2 = 0.625 + 0.5625 Reorder the terms: 0.5625 + 1.5y + y2 = 0.625 + 0.5625 Combine like terms: 0.625 + 0.5625 = 1.1875 0.5625 + 1.5y + y2 = 1.1875 Factor a perfect square on the left side: (y + 0.75)(y + 0.75) = 1.1875 Calculate the square root of the right side: 1.089724736 Break this problem into two subproblems by setting (y + 0.75) equal to 1.089724736 and -1.089724736.Subproblem 1
y + 0.75 = 1.089724736 Simplifying y + 0.75 = 1.089724736 Reorder the terms: 0.75 + y = 1.089724736 Solving 0.75 + y = 1.089724736 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + y = 1.089724736 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + y = 1.089724736 + -0.75 y = 1.089724736 + -0.75 Combine like terms: 1.089724736 + -0.75 = 0.339724736 y = 0.339724736 Simplifying y = 0.339724736Subproblem 2
y + 0.75 = -1.089724736 Simplifying y + 0.75 = -1.089724736 Reorder the terms: 0.75 + y = -1.089724736 Solving 0.75 + y = -1.089724736 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + y = -1.089724736 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + y = -1.089724736 + -0.75 y = -1.089724736 + -0.75 Combine like terms: -1.089724736 + -0.75 = -1.839724736 y = -1.839724736 Simplifying y = -1.839724736Solution
The solution to the problem is based on the solutions from the subproblems. y = {0.339724736, -1.839724736}
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