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Simplifying -5y2 + 11y + 2 = 0 Reorder the terms: 2 + 11y + -5y2 = 0 Solving 2 + 11y + -5y2 = 0 Solving for variable 'y'. Begin completing the square. Divide all terms by -5 the coefficient of the squared term: Divide each side by '-5'. -0.4 + -2.2y + y2 = 0 Move the constant term to the right: Add '0.4' to each side of the equation. -0.4 + -2.2y + 0.4 + y2 = 0 + 0.4 Reorder the terms: -0.4 + 0.4 + -2.2y + y2 = 0 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + -2.2y + y2 = 0 + 0.4 -2.2y + y2 = 0 + 0.4 Combine like terms: 0 + 0.4 = 0.4 -2.2y + y2 = 0.4 The y term is -2.2y. Take half its coefficient (-1.1). Square it (1.21) and add it to both sides. Add '1.21' to each side of the equation. -2.2y + 1.21 + y2 = 0.4 + 1.21 Reorder the terms: 1.21 + -2.2y + y2 = 0.4 + 1.21 Combine like terms: 0.4 + 1.21 = 1.61 1.21 + -2.2y + y2 = 1.61 Factor a perfect square on the left side: (y + -1.1)(y + -1.1) = 1.61 Calculate the square root of the right side: 1.268857754 Break this problem into two subproblems by setting (y + -1.1) equal to 1.268857754 and -1.268857754.Subproblem 1
y + -1.1 = 1.268857754 Simplifying y + -1.1 = 1.268857754 Reorder the terms: -1.1 + y = 1.268857754 Solving -1.1 + y = 1.268857754 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.1' to each side of the equation. -1.1 + 1.1 + y = 1.268857754 + 1.1 Combine like terms: -1.1 + 1.1 = 0.0 0.0 + y = 1.268857754 + 1.1 y = 1.268857754 + 1.1 Combine like terms: 1.268857754 + 1.1 = 2.368857754 y = 2.368857754 Simplifying y = 2.368857754Subproblem 2
y + -1.1 = -1.268857754 Simplifying y + -1.1 = -1.268857754 Reorder the terms: -1.1 + y = -1.268857754 Solving -1.1 + y = -1.268857754 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.1' to each side of the equation. -1.1 + 1.1 + y = -1.268857754 + 1.1 Combine like terms: -1.1 + 1.1 = 0.0 0.0 + y = -1.268857754 + 1.1 y = -1.268857754 + 1.1 Combine like terms: -1.268857754 + 1.1 = -0.168857754 y = -0.168857754 Simplifying y = -0.168857754Solution
The solution to the problem is based on the solutions from the subproblems. y = {2.368857754, -0.168857754}
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