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Simplifying 3.14(x2 + -9x + 9) = 0 Reorder the terms: 3.14(9 + -9x + x2) = 0 (9 * 3.14 + -9x * 3.14 + x2 * 3.14) = 0 (28.26 + -28.26x + 3.14x2) = 0 Solving 28.26 + -28.26x + 3.14x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 3.14 the coefficient of the squared term: Divide each side by '3.14'. 9 + -9x + x2 = 0 Move the constant term to the right: Add '-9' to each side of the equation. 9 + -9x + -9 + x2 = 0 + -9 Reorder the terms: 9 + -9 + -9x + x2 = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -9x + x2 = 0 + -9 -9x + x2 = 0 + -9 Combine like terms: 0 + -9 = -9 -9x + x2 = -9 The x term is -9x. Take half its coefficient (-4.5). Square it (20.25) and add it to both sides. Add '20.25' to each side of the equation. -9x + 20.25 + x2 = -9 + 20.25 Reorder the terms: 20.25 + -9x + x2 = -9 + 20.25 Combine like terms: -9 + 20.25 = 11.25 20.25 + -9x + x2 = 11.25 Factor a perfect square on the left side: (x + -4.5)(x + -4.5) = 11.25 Calculate the square root of the right side: 3.354101966 Break this problem into two subproblems by setting (x + -4.5) equal to 3.354101966 and -3.354101966.Subproblem 1
x + -4.5 = 3.354101966 Simplifying x + -4.5 = 3.354101966 Reorder the terms: -4.5 + x = 3.354101966 Solving -4.5 + x = 3.354101966 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = 3.354101966 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 3.354101966 + 4.5 x = 3.354101966 + 4.5 Combine like terms: 3.354101966 + 4.5 = 7.854101966 x = 7.854101966 Simplifying x = 7.854101966Subproblem 2
x + -4.5 = -3.354101966 Simplifying x + -4.5 = -3.354101966 Reorder the terms: -4.5 + x = -3.354101966 Solving -4.5 + x = -3.354101966 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = -3.354101966 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -3.354101966 + 4.5 x = -3.354101966 + 4.5 Combine like terms: -3.354101966 + 4.5 = 1.145898034 x = 1.145898034 Simplifying x = 1.145898034Solution
The solution to the problem is based on the solutions from the subproblems. x = {7.854101966, 1.145898034}
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