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Simplifying y2 + 12y + -40 = 0 Reorder the terms: -40 + 12y + y2 = 0 Solving -40 + 12y + y2 = 0 Solving for variable 'y'. Begin completing the square. Move the constant term to the right: Add '40' to each side of the equation. -40 + 12y + 40 + y2 = 0 + 40 Reorder the terms: -40 + 40 + 12y + y2 = 0 + 40 Combine like terms: -40 + 40 = 0 0 + 12y + y2 = 0 + 40 12y + y2 = 0 + 40 Combine like terms: 0 + 40 = 40 12y + y2 = 40 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 = 40 + 36 Reorder the terms: 36 + 12y + y2 = 40 + 36 Combine like terms: 40 + 36 = 76 36 + 12y + y2 = 76 Factor a perfect square on the left side: (y + 6)(y + 6) = 76 Calculate the square root of the right side: 8.717797887 Break this problem into two subproblems by setting (y + 6) equal to 8.717797887 and -8.717797887.Subproblem 1
y + 6 = 8.717797887 Simplifying y + 6 = 8.717797887 Reorder the terms: 6 + y = 8.717797887 Solving 6 + y = 8.717797887 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 = 8.717797887 + -6 Combine like terms: 6 + -6 = 0 0 + y = 8.717797887 + -6 y = 8.717797887 + -6 Combine like terms: 8.717797887 + -6 = 2.717797887 y = 2.717797887 Simplifying y = 2.717797887Subproblem 2
y + 6 = -8.717797887 Simplifying y + 6 = -8.717797887 Reorder the terms: 6 + y = -8.717797887 Solving 6 + y = -8.717797887 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 = -8.717797887 + -6 Combine like terms: 6 + -6 = 0 0 + y = -8.717797887 + -6 y = -8.717797887 + -6 Combine like terms: -8.717797887 + -6 = -14.717797887 y = -14.717797887 Simplifying y = -14.717797887Solution
The solution to the problem is based on the solutions from the subproblems. y = {2.717797887, -14.717797887}
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