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Simplifying 2x2 + 31x + -73 = 0 Reorder the terms: -73 + 31x + 2x2 = 0 Solving -73 + 31x + 2x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -36.5 + 15.5x + x2 = 0 Move the constant term to the right: Add '36.5' to each side of the equation. -36.5 + 15.5x + 36.5 + x2 = 0 + 36.5 Reorder the terms: -36.5 + 36.5 + 15.5x + x2 = 0 + 36.5 Combine like terms: -36.5 + 36.5 = 0.0 0.0 + 15.5x + x2 = 0 + 36.5 15.5x + x2 = 0 + 36.5 Combine like terms: 0 + 36.5 = 36.5 15.5x + x2 = 36.5 The x term is 15.5x. Take half its coefficient (7.75). Square it (60.0625) and add it to both sides. Add '60.0625' to each side of the equation. 15.5x + 60.0625 + x2 = 36.5 + 60.0625 Reorder the terms: 60.0625 + 15.5x + x2 = 36.5 + 60.0625 Combine like terms: 36.5 + 60.0625 = 96.5625 60.0625 + 15.5x + x2 = 96.5625 Factor a perfect square on the left side: (x + 7.75)(x + 7.75) = 96.5625 Calculate the square root of the right side: 9.826622004 Break this problem into two subproblems by setting (x + 7.75) equal to 9.826622004 and -9.826622004.Subproblem 1
x + 7.75 = 9.826622004 Simplifying x + 7.75 = 9.826622004 Reorder the terms: 7.75 + x = 9.826622004 Solving 7.75 + x = 9.826622004 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7.75' to each side of the equation. 7.75 + -7.75 + x = 9.826622004 + -7.75 Combine like terms: 7.75 + -7.75 = 0.00 0.00 + x = 9.826622004 + -7.75 x = 9.826622004 + -7.75 Combine like terms: 9.826622004 + -7.75 = 2.076622004 x = 2.076622004 Simplifying x = 2.076622004Subproblem 2
x + 7.75 = -9.826622004 Simplifying x + 7.75 = -9.826622004 Reorder the terms: 7.75 + x = -9.826622004 Solving 7.75 + x = -9.826622004 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7.75' to each side of the equation. 7.75 + -7.75 + x = -9.826622004 + -7.75 Combine like terms: 7.75 + -7.75 = 0.00 0.00 + x = -9.826622004 + -7.75 x = -9.826622004 + -7.75 Combine like terms: -9.826622004 + -7.75 = -17.576622004 x = -17.576622004 Simplifying x = -17.576622004Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.076622004, -17.576622004}
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