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Simplifying 2x + 3x2 = 45 Solving 2x + 3x2 = 45 Solving for variable 'x'. Reorder the terms: -45 + 2x + 3x2 = 45 + -45 Combine like terms: 45 + -45 = 0 -45 + 2x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -15 + 0.6666666667x + x2 = 0 Move the constant term to the right: Add '15' to each side of the equation. -15 + 0.6666666667x + 15 + x2 = 0 + 15 Reorder the terms: -15 + 15 + 0.6666666667x + x2 = 0 + 15 Combine like terms: -15 + 15 = 0 0 + 0.6666666667x + x2 = 0 + 15 0.6666666667x + x2 = 0 + 15 Combine like terms: 0 + 15 = 15 0.6666666667x + x2 = 15 The x term is 0.6666666667x. Take half its coefficient (0.3333333334). Square it (0.1111111112) and add it to both sides. Add '0.1111111112' to each side of the equation. 0.6666666667x + 0.1111111112 + x2 = 15 + 0.1111111112 Reorder the terms: 0.1111111112 + 0.6666666667x + x2 = 15 + 0.1111111112 Combine like terms: 15 + 0.1111111112 = 15.1111111112 0.1111111112 + 0.6666666667x + x2 = 15.1111111112 Factor a perfect square on the left side: (x + 0.3333333334)(x + 0.3333333334) = 15.1111111112 Calculate the square root of the right side: 3.887301263 Break this problem into two subproblems by setting (x + 0.3333333334) equal to 3.887301263 and -3.887301263.Subproblem 1
x + 0.3333333334 = 3.887301263 Simplifying x + 0.3333333334 = 3.887301263 Reorder the terms: 0.3333333334 + x = 3.887301263 Solving 0.3333333334 + x = 3.887301263 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + x = 3.887301263 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = 3.887301263 + -0.3333333334 x = 3.887301263 + -0.3333333334 Combine like terms: 3.887301263 + -0.3333333334 = 3.5539679296 x = 3.5539679296 Simplifying x = 3.5539679296Subproblem 2
x + 0.3333333334 = -3.887301263 Simplifying x + 0.3333333334 = -3.887301263 Reorder the terms: 0.3333333334 + x = -3.887301263 Solving 0.3333333334 + x = -3.887301263 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + x = -3.887301263 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = -3.887301263 + -0.3333333334 x = -3.887301263 + -0.3333333334 Combine like terms: -3.887301263 + -0.3333333334 = -4.2206345964 x = -4.2206345964 Simplifying x = -4.2206345964Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.5539679296, -4.2206345964}
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