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Simplifying x2 + 40x + 3 = 0 Reorder the terms: 3 + 40x + x2 = 0 Solving 3 + 40x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-3' to each side of the equation. 3 + 40x + -3 + x2 = 0 + -3 Reorder the terms: 3 + -3 + 40x + x2 = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 40x + x2 = 0 + -3 40x + x2 = 0 + -3 Combine like terms: 0 + -3 = -3 40x + x2 = -3 The x term is 40x. Take half its coefficient (20). Square it (400) and add it to both sides. Add '400' to each side of the equation. 40x + 400 + x2 = -3 + 400 Reorder the terms: 400 + 40x + x2 = -3 + 400 Combine like terms: -3 + 400 = 397 400 + 40x + x2 = 397 Factor a perfect square on the left side: (x + 20)(x + 20) = 397 Calculate the square root of the right side: 19.924858845 Break this problem into two subproblems by setting (x + 20) equal to 19.924858845 and -19.924858845.Subproblem 1
x + 20 = 19.924858845 Simplifying x + 20 = 19.924858845 Reorder the terms: 20 + x = 19.924858845 Solving 20 + x = 19.924858845 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + x = 19.924858845 + -20 Combine like terms: 20 + -20 = 0 0 + x = 19.924858845 + -20 x = 19.924858845 + -20 Combine like terms: 19.924858845 + -20 = -0.075141155 x = -0.075141155 Simplifying x = -0.075141155Subproblem 2
x + 20 = -19.924858845 Simplifying x + 20 = -19.924858845 Reorder the terms: 20 + x = -19.924858845 Solving 20 + x = -19.924858845 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + x = -19.924858845 + -20 Combine like terms: 20 + -20 = 0 0 + x = -19.924858845 + -20 x = -19.924858845 + -20 Combine like terms: -19.924858845 + -20 = -39.924858845 x = -39.924858845 Simplifying x = -39.924858845Solution
The solution to the problem is based on the solutions from the subproblems. x = {-0.075141155, -39.924858845}
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