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Simplifying -2y2 + 6y + 4 = 0 Reorder the terms: 4 + 6y + -2y2 = 0 Solving 4 + 6y + -2y2 = 0 Solving for variable 'y'. Factor out the Greatest Common Factor (GCF), '2'. 2(2 + 3y + -1y2) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(2 + 3y + -1y2)' equal to zero and attempt to solve: Simplifying 2 + 3y + -1y2 = 0 Solving 2 + 3y + -1y2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. -2 + -3y + y2 = 0 Move the constant term to the right: Add '2' to each side of the equation. -2 + -3y + 2 + y2 = 0 + 2 Reorder the terms: -2 + 2 + -3y + y2 = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -3y + y2 = 0 + 2 -3y + y2 = 0 + 2 Combine like terms: 0 + 2 = 2 -3y + y2 = 2 The y term is -3y. Take half its coefficient (-1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. -3y + 2.25 + y2 = 2 + 2.25 Reorder the terms: 2.25 + -3y + y2 = 2 + 2.25 Combine like terms: 2 + 2.25 = 4.25 2.25 + -3y + y2 = 4.25 Factor a perfect square on the left side: (y + -1.5)(y + -1.5) = 4.25 Calculate the square root of the right side: 2.061552813 Break this problem into two subproblems by setting (y + -1.5) equal to 2.061552813 and -2.061552813.Subproblem 1
y + -1.5 = 2.061552813 Simplifying y + -1.5 = 2.061552813 Reorder the terms: -1.5 + y = 2.061552813 Solving -1.5 + y = 2.061552813 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + y = 2.061552813 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + y = 2.061552813 + 1.5 y = 2.061552813 + 1.5 Combine like terms: 2.061552813 + 1.5 = 3.561552813 y = 3.561552813 Simplifying y = 3.561552813Subproblem 2
y + -1.5 = -2.061552813 Simplifying y + -1.5 = -2.061552813 Reorder the terms: -1.5 + y = -2.061552813 Solving -1.5 + y = -2.061552813 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + y = -2.061552813 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + y = -2.061552813 + 1.5 y = -2.061552813 + 1.5 Combine like terms: -2.061552813 + 1.5 = -0.561552813 y = -0.561552813 Simplifying y = -0.561552813Solution
The solution to the problem is based on the solutions from the subproblems. y = {3.561552813, -0.561552813}Solution
y = {3.561552813, -0.561552813}
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