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Simplifying -6y2 + -4y = -9 Reorder the terms: -4y + -6y2 = -9 Solving -4y + -6y2 = -9 Solving for variable 'y'. Reorder the terms: 9 + -4y + -6y2 = -9 + 9 Combine like terms: -9 + 9 = 0 9 + -4y + -6y2 = 0 Begin completing the square. Divide all terms by -6 the coefficient of the squared term: Divide each side by '-6'. -1.5 + 0.6666666667y + y2 = 0 Move the constant term to the right: Add '1.5' to each side of the equation. -1.5 + 0.6666666667y + 1.5 + y2 = 0 + 1.5 Reorder the terms: -1.5 + 1.5 + 0.6666666667y + y2 = 0 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + 0.6666666667y + y2 = 0 + 1.5 0.6666666667y + y2 = 0 + 1.5 Combine like terms: 0 + 1.5 = 1.5 0.6666666667y + y2 = 1.5 The y term is 0.6666666667y. Take half its coefficient (0.3333333334). Square it (0.1111111112) and add it to both sides. Add '0.1111111112' to each side of the equation. 0.6666666667y + 0.1111111112 + y2 = 1.5 + 0.1111111112 Reorder the terms: 0.1111111112 + 0.6666666667y + y2 = 1.5 + 0.1111111112 Combine like terms: 1.5 + 0.1111111112 = 1.6111111112 0.1111111112 + 0.6666666667y + y2 = 1.6111111112 Factor a perfect square on the left side: (y + 0.3333333334)(y + 0.3333333334) = 1.6111111112 Calculate the square root of the right side: 1.269295518 Break this problem into two subproblems by setting (y + 0.3333333334) equal to 1.269295518 and -1.269295518.Subproblem 1
y + 0.3333333334 = 1.269295518 Simplifying y + 0.3333333334 = 1.269295518 Reorder the terms: 0.3333333334 + y = 1.269295518 Solving 0.3333333334 + y = 1.269295518 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + y = 1.269295518 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + y = 1.269295518 + -0.3333333334 y = 1.269295518 + -0.3333333334 Combine like terms: 1.269295518 + -0.3333333334 = 0.9359621846 y = 0.9359621846 Simplifying y = 0.9359621846Subproblem 2
y + 0.3333333334 = -1.269295518 Simplifying y + 0.3333333334 = -1.269295518 Reorder the terms: 0.3333333334 + y = -1.269295518 Solving 0.3333333334 + y = -1.269295518 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + y = -1.269295518 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + y = -1.269295518 + -0.3333333334 y = -1.269295518 + -0.3333333334 Combine like terms: -1.269295518 + -0.3333333334 = -1.6026288514 y = -1.6026288514 Simplifying y = -1.6026288514Solution
The solution to the problem is based on the solutions from the subproblems. y = {0.9359621846, -1.6026288514}
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