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Simplifying x2 + 39x + 31 = 0 Reorder the terms: 31 + 39x + x2 = 0 Solving 31 + 39x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-31' to each side of the equation. 31 + 39x + -31 + x2 = 0 + -31 Reorder the terms: 31 + -31 + 39x + x2 = 0 + -31 Combine like terms: 31 + -31 = 0 0 + 39x + x2 = 0 + -31 39x + x2 = 0 + -31 Combine like terms: 0 + -31 = -31 39x + x2 = -31 The x term is 39x. Take half its coefficient (19.5). Square it (380.25) and add it to both sides. Add '380.25' to each side of the equation. 39x + 380.25 + x2 = -31 + 380.25 Reorder the terms: 380.25 + 39x + x2 = -31 + 380.25 Combine like terms: -31 + 380.25 = 349.25 380.25 + 39x + x2 = 349.25 Factor a perfect square on the left side: (x + 19.5)(x + 19.5) = 349.25 Calculate the square root of the right side: 18.688231591 Break this problem into two subproblems by setting (x + 19.5) equal to 18.688231591 and -18.688231591.Subproblem 1
x + 19.5 = 18.688231591 Simplifying x + 19.5 = 18.688231591 Reorder the terms: 19.5 + x = 18.688231591 Solving 19.5 + x = 18.688231591 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-19.5' to each side of the equation. 19.5 + -19.5 + x = 18.688231591 + -19.5 Combine like terms: 19.5 + -19.5 = 0.0 0.0 + x = 18.688231591 + -19.5 x = 18.688231591 + -19.5 Combine like terms: 18.688231591 + -19.5 = -0.811768409 x = -0.811768409 Simplifying x = -0.811768409Subproblem 2
x + 19.5 = -18.688231591 Simplifying x + 19.5 = -18.688231591 Reorder the terms: 19.5 + x = -18.688231591 Solving 19.5 + x = -18.688231591 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-19.5' to each side of the equation. 19.5 + -19.5 + x = -18.688231591 + -19.5 Combine like terms: 19.5 + -19.5 = 0.0 0.0 + x = -18.688231591 + -19.5 x = -18.688231591 + -19.5 Combine like terms: -18.688231591 + -19.5 = -38.188231591 x = -38.188231591 Simplifying x = -38.188231591Solution
The solution to the problem is based on the solutions from the subproblems. x = {-0.811768409, -38.188231591}
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