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Simplifying x2 + -11x + 39 = 3x + -8 Reorder the terms: 39 + -11x + x2 = 3x + -8 Reorder the terms: 39 + -11x + x2 = -8 + 3x Solving 39 + -11x + x2 = -8 + 3x Solving for variable 'x'. Reorder the terms: 39 + 8 + -11x + -3x + x2 = -8 + 3x + 8 + -3x Combine like terms: 39 + 8 = 47 47 + -11x + -3x + x2 = -8 + 3x + 8 + -3x Combine like terms: -11x + -3x = -14x 47 + -14x + x2 = -8 + 3x + 8 + -3x Reorder the terms: 47 + -14x + x2 = -8 + 8 + 3x + -3x Combine like terms: -8 + 8 = 0 47 + -14x + x2 = 0 + 3x + -3x 47 + -14x + x2 = 3x + -3x Combine like terms: 3x + -3x = 0 47 + -14x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-47' to each side of the equation. 47 + -14x + -47 + x2 = 0 + -47 Reorder the terms: 47 + -47 + -14x + x2 = 0 + -47 Combine like terms: 47 + -47 = 0 0 + -14x + x2 = 0 + -47 -14x + x2 = 0 + -47 Combine like terms: 0 + -47 = -47 -14x + x2 = -47 The x term is -14x. Take half its coefficient (-7). Square it (49) and add it to both sides. Add '49' to each side of the equation. -14x + 49 + x2 = -47 + 49 Reorder the terms: 49 + -14x + x2 = -47 + 49 Combine like terms: -47 + 49 = 2 49 + -14x + x2 = 2 Factor a perfect square on the left side: (x + -7)(x + -7) = 2 Calculate the square root of the right side: 1.414213562 Break this problem into two subproblems by setting (x + -7) equal to 1.414213562 and -1.414213562.Subproblem 1
x + -7 = 1.414213562 Simplifying x + -7 = 1.414213562 Reorder the terms: -7 + x = 1.414213562 Solving -7 + x = 1.414213562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + x = 1.414213562 + 7 Combine like terms: -7 + 7 = 0 0 + x = 1.414213562 + 7 x = 1.414213562 + 7 Combine like terms: 1.414213562 + 7 = 8.414213562 x = 8.414213562 Simplifying x = 8.414213562Subproblem 2
x + -7 = -1.414213562 Simplifying x + -7 = -1.414213562 Reorder the terms: -7 + x = -1.414213562 Solving -7 + x = -1.414213562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + x = -1.414213562 + 7 Combine like terms: -7 + 7 = 0 0 + x = -1.414213562 + 7 x = -1.414213562 + 7 Combine like terms: -1.414213562 + 7 = 5.585786438 x = 5.585786438 Simplifying x = 5.585786438Solution
The solution to the problem is based on the solutions from the subproblems. x = {8.414213562, 5.585786438}
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