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Simplifying x = -7x2 + 3x + 2 Reorder the terms: x = 2 + 3x + -7x2 Solving x = 2 + 3x + -7x2 Solving for variable 'x'. Reorder the terms: -2 + x + -3x + 7x2 = 2 + 3x + -7x2 + -2 + -3x + 7x2 Combine like terms: x + -3x = -2x -2 + -2x + 7x2 = 2 + 3x + -7x2 + -2 + -3x + 7x2 Reorder the terms: -2 + -2x + 7x2 = 2 + -2 + 3x + -3x + -7x2 + 7x2 Combine like terms: 2 + -2 = 0 -2 + -2x + 7x2 = 0 + 3x + -3x + -7x2 + 7x2 -2 + -2x + 7x2 = 3x + -3x + -7x2 + 7x2 Combine like terms: 3x + -3x = 0 -2 + -2x + 7x2 = 0 + -7x2 + 7x2 -2 + -2x + 7x2 = -7x2 + 7x2 Combine like terms: -7x2 + 7x2 = 0 -2 + -2x + 7x2 = 0 Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. -0.2857142857 + -0.2857142857x + x2 = 0 Move the constant term to the right: Add '0.2857142857' to each side of the equation. -0.2857142857 + -0.2857142857x + 0.2857142857 + x2 = 0 + 0.2857142857 Reorder the terms: -0.2857142857 + 0.2857142857 + -0.2857142857x + x2 = 0 + 0.2857142857 Combine like terms: -0.2857142857 + 0.2857142857 = 0.0000000000 0.0000000000 + -0.2857142857x + x2 = 0 + 0.2857142857 -0.2857142857x + x2 = 0 + 0.2857142857 Combine like terms: 0 + 0.2857142857 = 0.2857142857 -0.2857142857x + x2 = 0.2857142857 The x term is -0.2857142857x. Take half its coefficient (-0.1428571429). Square it (0.02040816328) and add it to both sides. Add '0.02040816328' to each side of the equation. -0.2857142857x + 0.02040816328 + x2 = 0.2857142857 + 0.02040816328 Reorder the terms: 0.02040816328 + -0.2857142857x + x2 = 0.2857142857 + 0.02040816328 Combine like terms: 0.2857142857 + 0.02040816328 = 0.30612244898 0.02040816328 + -0.2857142857x + x2 = 0.30612244898 Factor a perfect square on the left side: (x + -0.1428571429)(x + -0.1428571429) = 0.30612244898 Calculate the square root of the right side: 0.553283335 Break this problem into two subproblems by setting (x + -0.1428571429) equal to 0.553283335 and -0.553283335.Subproblem 1
x + -0.1428571429 = 0.553283335 Simplifying x + -0.1428571429 = 0.553283335 Reorder the terms: -0.1428571429 + x = 0.553283335 Solving -0.1428571429 + x = 0.553283335 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1428571429' to each side of the equation. -0.1428571429 + 0.1428571429 + x = 0.553283335 + 0.1428571429 Combine like terms: -0.1428571429 + 0.1428571429 = 0.0000000000 0.0000000000 + x = 0.553283335 + 0.1428571429 x = 0.553283335 + 0.1428571429 Combine like terms: 0.553283335 + 0.1428571429 = 0.6961404779 x = 0.6961404779 Simplifying x = 0.6961404779Subproblem 2
x + -0.1428571429 = -0.553283335 Simplifying x + -0.1428571429 = -0.553283335 Reorder the terms: -0.1428571429 + x = -0.553283335 Solving -0.1428571429 + x = -0.553283335 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1428571429' to each side of the equation. -0.1428571429 + 0.1428571429 + x = -0.553283335 + 0.1428571429 Combine like terms: -0.1428571429 + 0.1428571429 = 0.0000000000 0.0000000000 + x = -0.553283335 + 0.1428571429 x = -0.553283335 + 0.1428571429 Combine like terms: -0.553283335 + 0.1428571429 = -0.4104261921 x = -0.4104261921 Simplifying x = -0.4104261921Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.6961404779, -0.4104261921}
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