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Simplifying 3y2 + 2y + -75 = 0 Reorder the terms: -75 + 2y + 3y2 = 0 Solving -75 + 2y + 3y2 = 0 Solving for variable 'y'. Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -25 + 0.6666666667y + y2 = 0 Move the constant term to the right: Add '25' to each side of the equation. -25 + 0.6666666667y + 25 + y2 = 0 + 25 Reorder the terms: -25 + 25 + 0.6666666667y + y2 = 0 + 25 Combine like terms: -25 + 25 = 0 0 + 0.6666666667y + y2 = 0 + 25 0.6666666667y + y2 = 0 + 25 Combine like terms: 0 + 25 = 25 0.6666666667y + y2 = 25 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 = 25 + 0.1111111112 Reorder the terms: 0.1111111112 + 0.6666666667y + y2 = 25 + 0.1111111112 Combine like terms: 25 + 0.1111111112 = 25.1111111112 0.1111111112 + 0.6666666667y + y2 = 25.1111111112 Factor a perfect square on the left side: (y + 0.3333333334)(y + 0.3333333334) = 25.1111111112 Calculate the square root of the right side: 5.011098793 Break this problem into two subproblems by setting (y + 0.3333333334) equal to 5.011098793 and -5.011098793.Subproblem 1
y + 0.3333333334 = 5.011098793 Simplifying y + 0.3333333334 = 5.011098793 Reorder the terms: 0.3333333334 + y = 5.011098793 Solving 0.3333333334 + y = 5.011098793 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 = 5.011098793 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + y = 5.011098793 + -0.3333333334 y = 5.011098793 + -0.3333333334 Combine like terms: 5.011098793 + -0.3333333334 = 4.6777654596 y = 4.6777654596 Simplifying y = 4.6777654596Subproblem 2
y + 0.3333333334 = -5.011098793 Simplifying y + 0.3333333334 = -5.011098793 Reorder the terms: 0.3333333334 + y = -5.011098793 Solving 0.3333333334 + y = -5.011098793 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 = -5.011098793 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + y = -5.011098793 + -0.3333333334 y = -5.011098793 + -0.3333333334 Combine like terms: -5.011098793 + -0.3333333334 = -5.3444321264 y = -5.3444321264 Simplifying y = -5.3444321264Solution
The solution to the problem is based on the solutions from the subproblems. y = {4.6777654596, -5.3444321264}
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