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Simplifying 2y2 + 10y + -9 = 0 Reorder the terms: -9 + 10y + 2y2 = 0 Solving -9 + 10y + 2y2 = 0 Solving for variable 'y'. Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -4.5 + 5y + y2 = 0 Move the constant term to the right: Add '4.5' to each side of the equation. -4.5 + 5y + 4.5 + y2 = 0 + 4.5 Reorder the terms: -4.5 + 4.5 + 5y + y2 = 0 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + 5y + y2 = 0 + 4.5 5y + y2 = 0 + 4.5 Combine like terms: 0 + 4.5 = 4.5 5y + y2 = 4.5 The y term is 5y. Take half its coefficient (2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. 5y + 6.25 + y2 = 4.5 + 6.25 Reorder the terms: 6.25 + 5y + y2 = 4.5 + 6.25 Combine like terms: 4.5 + 6.25 = 10.75 6.25 + 5y + y2 = 10.75 Factor a perfect square on the left side: (y + 2.5)(y + 2.5) = 10.75 Calculate the square root of the right side: 3.278719262 Break this problem into two subproblems by setting (y + 2.5) equal to 3.278719262 and -3.278719262.Subproblem 1
y + 2.5 = 3.278719262 Simplifying y + 2.5 = 3.278719262 Reorder the terms: 2.5 + y = 3.278719262 Solving 2.5 + y = 3.278719262 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + y = 3.278719262 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + y = 3.278719262 + -2.5 y = 3.278719262 + -2.5 Combine like terms: 3.278719262 + -2.5 = 0.778719262 y = 0.778719262 Simplifying y = 0.778719262Subproblem 2
y + 2.5 = -3.278719262 Simplifying y + 2.5 = -3.278719262 Reorder the terms: 2.5 + y = -3.278719262 Solving 2.5 + y = -3.278719262 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + y = -3.278719262 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + y = -3.278719262 + -2.5 y = -3.278719262 + -2.5 Combine like terms: -3.278719262 + -2.5 = -5.778719262 y = -5.778719262 Simplifying y = -5.778719262Solution
The solution to the problem is based on the solutions from the subproblems. y = {0.778719262, -5.778719262}
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