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Simplifying 5x2 + -18x + -6 = x2 + -25x + 25 Reorder the terms: -6 + -18x + 5x2 = x2 + -25x + 25 Reorder the terms: -6 + -18x + 5x2 = 25 + -25x + x2 Solving -6 + -18x + 5x2 = 25 + -25x + x2 Solving for variable 'x'. Reorder the terms: -6 + -25 + -18x + 25x + 5x2 + -1x2 = 25 + -25x + x2 + -25 + 25x + -1x2 Combine like terms: -6 + -25 = -31 -31 + -18x + 25x + 5x2 + -1x2 = 25 + -25x + x2 + -25 + 25x + -1x2 Combine like terms: -18x + 25x = 7x -31 + 7x + 5x2 + -1x2 = 25 + -25x + x2 + -25 + 25x + -1x2 Combine like terms: 5x2 + -1x2 = 4x2 -31 + 7x + 4x2 = 25 + -25x + x2 + -25 + 25x + -1x2 Reorder the terms: -31 + 7x + 4x2 = 25 + -25 + -25x + 25x + x2 + -1x2 Combine like terms: 25 + -25 = 0 -31 + 7x + 4x2 = 0 + -25x + 25x + x2 + -1x2 -31 + 7x + 4x2 = -25x + 25x + x2 + -1x2 Combine like terms: -25x + 25x = 0 -31 + 7x + 4x2 = 0 + x2 + -1x2 -31 + 7x + 4x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -31 + 7x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -7.75 + 1.75x + x2 = 0 Move the constant term to the right: Add '7.75' to each side of the equation. -7.75 + 1.75x + 7.75 + x2 = 0 + 7.75 Reorder the terms: -7.75 + 7.75 + 1.75x + x2 = 0 + 7.75 Combine like terms: -7.75 + 7.75 = 0.00 0.00 + 1.75x + x2 = 0 + 7.75 1.75x + x2 = 0 + 7.75 Combine like terms: 0 + 7.75 = 7.75 1.75x + x2 = 7.75 The x term is 1.75x. Take half its coefficient (0.875). Square it (0.765625) and add it to both sides. Add '0.765625' to each side of the equation. 1.75x + 0.765625 + x2 = 7.75 + 0.765625 Reorder the terms: 0.765625 + 1.75x + x2 = 7.75 + 0.765625 Combine like terms: 7.75 + 0.765625 = 8.515625 0.765625 + 1.75x + x2 = 8.515625 Factor a perfect square on the left side: (x + 0.875)(x + 0.875) = 8.515625 Calculate the square root of the right side: 2.918154382 Break this problem into two subproblems by setting (x + 0.875) equal to 2.918154382 and -2.918154382.Subproblem 1
x + 0.875 = 2.918154382 Simplifying x + 0.875 = 2.918154382 Reorder the terms: 0.875 + x = 2.918154382 Solving 0.875 + x = 2.918154382 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.875' to each side of the equation. 0.875 + -0.875 + x = 2.918154382 + -0.875 Combine like terms: 0.875 + -0.875 = 0.000 0.000 + x = 2.918154382 + -0.875 x = 2.918154382 + -0.875 Combine like terms: 2.918154382 + -0.875 = 2.043154382 x = 2.043154382 Simplifying x = 2.043154382Subproblem 2
x + 0.875 = -2.918154382 Simplifying x + 0.875 = -2.918154382 Reorder the terms: 0.875 + x = -2.918154382 Solving 0.875 + x = -2.918154382 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.875' to each side of the equation. 0.875 + -0.875 + x = -2.918154382 + -0.875 Combine like terms: 0.875 + -0.875 = 0.000 0.000 + x = -2.918154382 + -0.875 x = -2.918154382 + -0.875 Combine like terms: -2.918154382 + -0.875 = -3.793154382 x = -3.793154382 Simplifying x = -3.793154382Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.043154382, -3.793154382}
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