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Simplifying -4.5y + y2 = 9 Solving -4.5y + y2 = 9 Solving for variable 'y'. Reorder the terms: -9 + -4.5y + y2 = 9 + -9 Combine like terms: 9 + -9 = 0 -9 + -4.5y + y2 = 0 Begin completing the square. Move the constant term to the right: Add '9' to each side of the equation. -9 + -4.5y + 9 + y2 = 0 + 9 Reorder the terms: -9 + 9 + -4.5y + y2 = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -4.5y + y2 = 0 + 9 -4.5y + y2 = 0 + 9 Combine like terms: 0 + 9 = 9 -4.5y + y2 = 9 The y term is -4.5y. Take half its coefficient (-2.25). Square it (5.0625) and add it to both sides. Add '5.0625' to each side of the equation. -4.5y + 5.0625 + y2 = 9 + 5.0625 Reorder the terms: 5.0625 + -4.5y + y2 = 9 + 5.0625 Combine like terms: 9 + 5.0625 = 14.0625 5.0625 + -4.5y + y2 = 14.0625 Factor a perfect square on the left side: (y + -2.25)(y + -2.25) = 14.0625 Calculate the square root of the right side: 3.75 Break this problem into two subproblems by setting (y + -2.25) equal to 3.75 and -3.75.Subproblem 1
y + -2.25 = 3.75 Simplifying y + -2.25 = 3.75 Reorder the terms: -2.25 + y = 3.75 Solving -2.25 + y = 3.75 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + y = 3.75 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + y = 3.75 + 2.25 y = 3.75 + 2.25 Combine like terms: 3.75 + 2.25 = 6 y = 6 Simplifying y = 6Subproblem 2
y + -2.25 = -3.75 Simplifying y + -2.25 = -3.75 Reorder the terms: -2.25 + y = -3.75 Solving -2.25 + y = -3.75 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + y = -3.75 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + y = -3.75 + 2.25 y = -3.75 + 2.25 Combine like terms: -3.75 + 2.25 = -1.5 y = -1.5 Simplifying y = -1.5Solution
The solution to the problem is based on the solutions from the subproblems. y = {6, -1.5}
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