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Simplifying -2y + -1y2 + 6 + -4y2 = 0 Reorder the terms: 6 + -2y + -1y2 + -4y2 = 0 Combine like terms: -1y2 + -4y2 = -5y2 6 + -2y + -5y2 = 0 Solving 6 + -2y + -5y2 = 0 Solving for variable 'y'. Begin completing the square. Divide all terms by -5 the coefficient of the squared term: Divide each side by '-5'. -1.2 + 0.4y + y2 = 0 Move the constant term to the right: Add '1.2' to each side of the equation. -1.2 + 0.4y + 1.2 + y2 = 0 + 1.2 Reorder the terms: -1.2 + 1.2 + 0.4y + y2 = 0 + 1.2 Combine like terms: -1.2 + 1.2 = 0.0 0.0 + 0.4y + y2 = 0 + 1.2 0.4y + y2 = 0 + 1.2 Combine like terms: 0 + 1.2 = 1.2 0.4y + y2 = 1.2 The y term is 0.4y. Take half its coefficient (0.2). Square it (0.04) and add it to both sides. Add '0.04' to each side of the equation. 0.4y + 0.04 + y2 = 1.2 + 0.04 Reorder the terms: 0.04 + 0.4y + y2 = 1.2 + 0.04 Combine like terms: 1.2 + 0.04 = 1.24 0.04 + 0.4y + y2 = 1.24 Factor a perfect square on the left side: (y + 0.2)(y + 0.2) = 1.24 Calculate the square root of the right side: 1.113552873 Break this problem into two subproblems by setting (y + 0.2) equal to 1.113552873 and -1.113552873.Subproblem 1
y + 0.2 = 1.113552873 Simplifying y + 0.2 = 1.113552873 Reorder the terms: 0.2 + y = 1.113552873 Solving 0.2 + y = 1.113552873 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + y = 1.113552873 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + y = 1.113552873 + -0.2 y = 1.113552873 + -0.2 Combine like terms: 1.113552873 + -0.2 = 0.913552873 y = 0.913552873 Simplifying y = 0.913552873Subproblem 2
y + 0.2 = -1.113552873 Simplifying y + 0.2 = -1.113552873 Reorder the terms: 0.2 + y = -1.113552873 Solving 0.2 + y = -1.113552873 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + y = -1.113552873 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + y = -1.113552873 + -0.2 y = -1.113552873 + -0.2 Combine like terms: -1.113552873 + -0.2 = -1.313552873 y = -1.313552873 Simplifying y = -1.313552873Solution
The solution to the problem is based on the solutions from the subproblems. y = {0.913552873, -1.313552873}
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