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Simplifying -6y2 + -9y = -4 Reorder the terms: -9y + -6y2 = -4 Solving -9y + -6y2 = -4 Solving for variable 'y'. Reorder the terms: 4 + -9y + -6y2 = -4 + 4 Combine like terms: -4 + 4 = 0 4 + -9y + -6y2 = 0 Begin completing the square. Divide all terms by -6 the coefficient of the squared term: Divide each side by '-6'. -0.6666666667 + 1.5y + y2 = 0 Move the constant term to the right: Add '0.6666666667' to each side of the equation. -0.6666666667 + 1.5y + 0.6666666667 + y2 = 0 + 0.6666666667 Reorder the terms: -0.6666666667 + 0.6666666667 + 1.5y + y2 = 0 + 0.6666666667 Combine like terms: -0.6666666667 + 0.6666666667 = 0.0000000000 0.0000000000 + 1.5y + y2 = 0 + 0.6666666667 1.5y + y2 = 0 + 0.6666666667 Combine like terms: 0 + 0.6666666667 = 0.6666666667 1.5y + y2 = 0.6666666667 The y term is 1.5y. Take half its coefficient (0.75). Square it (0.5625) and add it to both sides. Add '0.5625' to each side of the equation. 1.5y + 0.5625 + y2 = 0.6666666667 + 0.5625 Reorder the terms: 0.5625 + 1.5y + y2 = 0.6666666667 + 0.5625 Combine like terms: 0.6666666667 + 0.5625 = 1.2291666667 0.5625 + 1.5y + y2 = 1.2291666667 Factor a perfect square on the left side: (y + 0.75)(y + 0.75) = 1.2291666667 Calculate the square root of the right side: 1.108677891 Break this problem into two subproblems by setting (y + 0.75) equal to 1.108677891 and -1.108677891.Subproblem 1
y + 0.75 = 1.108677891 Simplifying y + 0.75 = 1.108677891 Reorder the terms: 0.75 + y = 1.108677891 Solving 0.75 + y = 1.108677891 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + y = 1.108677891 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + y = 1.108677891 + -0.75 y = 1.108677891 + -0.75 Combine like terms: 1.108677891 + -0.75 = 0.358677891 y = 0.358677891 Simplifying y = 0.358677891Subproblem 2
y + 0.75 = -1.108677891 Simplifying y + 0.75 = -1.108677891 Reorder the terms: 0.75 + y = -1.108677891 Solving 0.75 + y = -1.108677891 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + y = -1.108677891 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + y = -1.108677891 + -0.75 y = -1.108677891 + -0.75 Combine like terms: -1.108677891 + -0.75 = -1.858677891 y = -1.858677891 Simplifying y = -1.858677891Solution
The solution to the problem is based on the solutions from the subproblems. y = {0.358677891, -1.858677891}
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