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Simplifying x2 + 11x + 28 = 56 Reorder the terms: 28 + 11x + x2 = 56 Solving 28 + 11x + x2 = 56 Solving for variable 'x'. Reorder the terms: 28 + -56 + 11x + x2 = 56 + -56 Combine like terms: 28 + -56 = -28 -28 + 11x + x2 = 56 + -56 Combine like terms: 56 + -56 = 0 -28 + 11x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '28' to each side of the equation. -28 + 11x + 28 + x2 = 0 + 28 Reorder the terms: -28 + 28 + 11x + x2 = 0 + 28 Combine like terms: -28 + 28 = 0 0 + 11x + x2 = 0 + 28 11x + x2 = 0 + 28 Combine like terms: 0 + 28 = 28 11x + x2 = 28 The x term is 11x. Take half its coefficient (5.5). Square it (30.25) and add it to both sides. Add '30.25' to each side of the equation. 11x + 30.25 + x2 = 28 + 30.25 Reorder the terms: 30.25 + 11x + x2 = 28 + 30.25 Combine like terms: 28 + 30.25 = 58.25 30.25 + 11x + x2 = 58.25 Factor a perfect square on the left side: (x + 5.5)(x + 5.5) = 58.25 Calculate the square root of the right side: 7.632168761 Break this problem into two subproblems by setting (x + 5.5) equal to 7.632168761 and -7.632168761.Subproblem 1
x + 5.5 = 7.632168761 Simplifying x + 5.5 = 7.632168761 Reorder the terms: 5.5 + x = 7.632168761 Solving 5.5 + x = 7.632168761 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + x = 7.632168761 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = 7.632168761 + -5.5 x = 7.632168761 + -5.5 Combine like terms: 7.632168761 + -5.5 = 2.132168761 x = 2.132168761 Simplifying x = 2.132168761Subproblem 2
x + 5.5 = -7.632168761 Simplifying x + 5.5 = -7.632168761 Reorder the terms: 5.5 + x = -7.632168761 Solving 5.5 + x = -7.632168761 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + x = -7.632168761 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = -7.632168761 + -5.5 x = -7.632168761 + -5.5 Combine like terms: -7.632168761 + -5.5 = -13.132168761 x = -13.132168761 Simplifying x = -13.132168761Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.132168761, -13.132168761}
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