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Simplifying y2 + -12y + 31 = 0 Reorder the terms: 31 + -12y + y2 = 0 Solving 31 + -12y + y2 = 0 Solving for variable 'y'. Begin completing the square. Move the constant term to the right: Add '-31' to each side of the equation. 31 + -12y + -31 + y2 = 0 + -31 Reorder the terms: 31 + -31 + -12y + y2 = 0 + -31 Combine like terms: 31 + -31 = 0 0 + -12y + y2 = 0 + -31 -12y + y2 = 0 + -31 Combine like terms: 0 + -31 = -31 -12y + y2 = -31 The y term is -12y. Take half its coefficient (-6). Square it (36) and add it to both sides. Add '36' to each side of the equation. -12y + 36 + y2 = -31 + 36 Reorder the terms: 36 + -12y + y2 = -31 + 36 Combine like terms: -31 + 36 = 5 36 + -12y + y2 = 5 Factor a perfect square on the left side: (y + -6)(y + -6) = 5 Calculate the square root of the right side: 2.236067978 Break this problem into two subproblems by setting (y + -6) equal to 2.236067978 and -2.236067978.Subproblem 1
y + -6 = 2.236067978 Simplifying y + -6 = 2.236067978 Reorder the terms: -6 + y = 2.236067978 Solving -6 + y = 2.236067978 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + y = 2.236067978 + 6 Combine like terms: -6 + 6 = 0 0 + y = 2.236067978 + 6 y = 2.236067978 + 6 Combine like terms: 2.236067978 + 6 = 8.236067978 y = 8.236067978 Simplifying y = 8.236067978Subproblem 2
y + -6 = -2.236067978 Simplifying y + -6 = -2.236067978 Reorder the terms: -6 + y = -2.236067978 Solving -6 + y = -2.236067978 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + y = -2.236067978 + 6 Combine like terms: -6 + 6 = 0 0 + y = -2.236067978 + 6 y = -2.236067978 + 6 Combine like terms: -2.236067978 + 6 = 3.763932022 y = 3.763932022 Simplifying y = 3.763932022Solution
The solution to the problem is based on the solutions from the subproblems. y = {8.236067978, 3.763932022}
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