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Simplifying (-3y2 + -6y) + (5y2 + y + -8) = 0 Reorder the terms: (-6y + -3y2) + (5y2 + y + -8) = 0 Remove parenthesis around (-6y + -3y2) -6y + -3y2 + (5y2 + y + -8) = 0 Reorder the terms: -6y + -3y2 + (-8 + y + 5y2) = 0 Remove parenthesis around (-8 + y + 5y2) -6y + -3y2 + -8 + y + 5y2 = 0 Reorder the terms: -8 + -6y + y + -3y2 + 5y2 = 0 Combine like terms: -6y + y = -5y -8 + -5y + -3y2 + 5y2 = 0 Combine like terms: -3y2 + 5y2 = 2y2 -8 + -5y + 2y2 = 0 Solving -8 + -5y + 2y2 = 0 Solving for variable 'y'. Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -4 + -2.5y + y2 = 0 Move the constant term to the right: Add '4' to each side of the equation. -4 + -2.5y + 4 + y2 = 0 + 4 Reorder the terms: -4 + 4 + -2.5y + y2 = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -2.5y + y2 = 0 + 4 -2.5y + y2 = 0 + 4 Combine like terms: 0 + 4 = 4 -2.5y + y2 = 4 The y term is -2.5y. Take half its coefficient (-1.25). Square it (1.5625) and add it to both sides. Add '1.5625' to each side of the equation. -2.5y + 1.5625 + y2 = 4 + 1.5625 Reorder the terms: 1.5625 + -2.5y + y2 = 4 + 1.5625 Combine like terms: 4 + 1.5625 = 5.5625 1.5625 + -2.5y + y2 = 5.5625 Factor a perfect square on the left side: (y + -1.25)(y + -1.25) = 5.5625 Calculate the square root of the right side: 2.358495283 Break this problem into two subproblems by setting (y + -1.25) equal to 2.358495283 and -2.358495283.Subproblem 1
y + -1.25 = 2.358495283 Simplifying y + -1.25 = 2.358495283 Reorder the terms: -1.25 + y = 2.358495283 Solving -1.25 + y = 2.358495283 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + y = 2.358495283 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + y = 2.358495283 + 1.25 y = 2.358495283 + 1.25 Combine like terms: 2.358495283 + 1.25 = 3.608495283 y = 3.608495283 Simplifying y = 3.608495283Subproblem 2
y + -1.25 = -2.358495283 Simplifying y + -1.25 = -2.358495283 Reorder the terms: -1.25 + y = -2.358495283 Solving -1.25 + y = -2.358495283 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + y = -2.358495283 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + y = -2.358495283 + 1.25 y = -2.358495283 + 1.25 Combine like terms: -2.358495283 + 1.25 = -1.108495283 y = -1.108495283 Simplifying y = -1.108495283Solution
The solution to the problem is based on the solutions from the subproblems. y = {3.608495283, -1.108495283}
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