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Simplifying 8x2 = 8 + -7x Solving 8x2 = 8 + -7x Solving for variable 'x'. Reorder the terms: -8 + 7x + 8x2 = 8 + -7x + -8 + 7x Reorder the terms: -8 + 7x + 8x2 = 8 + -8 + -7x + 7x Combine like terms: 8 + -8 = 0 -8 + 7x + 8x2 = 0 + -7x + 7x -8 + 7x + 8x2 = -7x + 7x Combine like terms: -7x + 7x = 0 -8 + 7x + 8x2 = 0 Begin completing the square. Divide all terms by 8 the coefficient of the squared term: Divide each side by '8'. -1 + 0.875x + x2 = 0 Move the constant term to the right: Add '1' to each side of the equation. -1 + 0.875x + 1 + x2 = 0 + 1 Reorder the terms: -1 + 1 + 0.875x + x2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 0.875x + x2 = 0 + 1 0.875x + x2 = 0 + 1 Combine like terms: 0 + 1 = 1 0.875x + x2 = 1 The x term is 0.875x. Take half its coefficient (0.4375). Square it (0.19140625) and add it to both sides. Add '0.19140625' to each side of the equation. 0.875x + 0.19140625 + x2 = 1 + 0.19140625 Reorder the terms: 0.19140625 + 0.875x + x2 = 1 + 0.19140625 Combine like terms: 1 + 0.19140625 = 1.19140625 0.19140625 + 0.875x + x2 = 1.19140625 Factor a perfect square on the left side: (x + 0.4375)(x + 0.4375) = 1.19140625 Calculate the square root of the right side: 1.091515575 Break this problem into two subproblems by setting (x + 0.4375) equal to 1.091515575 and -1.091515575.Subproblem 1
x + 0.4375 = 1.091515575 Simplifying x + 0.4375 = 1.091515575 Reorder the terms: 0.4375 + x = 1.091515575 Solving 0.4375 + x = 1.091515575 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4375' to each side of the equation. 0.4375 + -0.4375 + x = 1.091515575 + -0.4375 Combine like terms: 0.4375 + -0.4375 = 0.0000 0.0000 + x = 1.091515575 + -0.4375 x = 1.091515575 + -0.4375 Combine like terms: 1.091515575 + -0.4375 = 0.654015575 x = 0.654015575 Simplifying x = 0.654015575Subproblem 2
x + 0.4375 = -1.091515575 Simplifying x + 0.4375 = -1.091515575 Reorder the terms: 0.4375 + x = -1.091515575 Solving 0.4375 + x = -1.091515575 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4375' to each side of the equation. 0.4375 + -0.4375 + x = -1.091515575 + -0.4375 Combine like terms: 0.4375 + -0.4375 = 0.0000 0.0000 + x = -1.091515575 + -0.4375 x = -1.091515575 + -0.4375 Combine like terms: -1.091515575 + -0.4375 = -1.529015575 x = -1.529015575 Simplifying x = -1.529015575Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.654015575, -1.529015575}
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