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Simplifying 2x2 + 17x + -120 = 0 Reorder the terms: -120 + 17x + 2x2 = 0 Solving -120 + 17x + 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'. -60 + 8.5x + x2 = 0 Move the constant term to the right: Add '60' to each side of the equation. -60 + 8.5x + 60 + x2 = 0 + 60 Reorder the terms: -60 + 60 + 8.5x + x2 = 0 + 60 Combine like terms: -60 + 60 = 0 0 + 8.5x + x2 = 0 + 60 8.5x + x2 = 0 + 60 Combine like terms: 0 + 60 = 60 8.5x + x2 = 60 The x term is 8.5x. Take half its coefficient (4.25). Square it (18.0625) and add it to both sides. Add '18.0625' to each side of the equation. 8.5x + 18.0625 + x2 = 60 + 18.0625 Reorder the terms: 18.0625 + 8.5x + x2 = 60 + 18.0625 Combine like terms: 60 + 18.0625 = 78.0625 18.0625 + 8.5x + x2 = 78.0625 Factor a perfect square on the left side: (x + 4.25)(x + 4.25) = 78.0625 Calculate the square root of the right side: 8.835298524 Break this problem into two subproblems by setting (x + 4.25) equal to 8.835298524 and -8.835298524.Subproblem 1
x + 4.25 = 8.835298524 Simplifying x + 4.25 = 8.835298524 Reorder the terms: 4.25 + x = 8.835298524 Solving 4.25 + x = 8.835298524 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.25' to each side of the equation. 4.25 + -4.25 + x = 8.835298524 + -4.25 Combine like terms: 4.25 + -4.25 = 0.00 0.00 + x = 8.835298524 + -4.25 x = 8.835298524 + -4.25 Combine like terms: 8.835298524 + -4.25 = 4.585298524 x = 4.585298524 Simplifying x = 4.585298524Subproblem 2
x + 4.25 = -8.835298524 Simplifying x + 4.25 = -8.835298524 Reorder the terms: 4.25 + x = -8.835298524 Solving 4.25 + x = -8.835298524 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.25' to each side of the equation. 4.25 + -4.25 + x = -8.835298524 + -4.25 Combine like terms: 4.25 + -4.25 = 0.00 0.00 + x = -8.835298524 + -4.25 x = -8.835298524 + -4.25 Combine like terms: -8.835298524 + -4.25 = -13.085298524 x = -13.085298524 Simplifying x = -13.085298524Solution
The solution to the problem is based on the solutions from the subproblems. x = {4.585298524, -13.085298524}
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