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Simplifying 8x2 + -10x + -13 = 0 Reorder the terms: -13 + -10x + 8x2 = 0 Solving -13 + -10x + 8x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 8 the coefficient of the squared term: Divide each side by '8'. -1.625 + -1.25x + x2 = 0 Move the constant term to the right: Add '1.625' to each side of the equation. -1.625 + -1.25x + 1.625 + x2 = 0 + 1.625 Reorder the terms: -1.625 + 1.625 + -1.25x + x2 = 0 + 1.625 Combine like terms: -1.625 + 1.625 = 0.000 0.000 + -1.25x + x2 = 0 + 1.625 -1.25x + x2 = 0 + 1.625 Combine like terms: 0 + 1.625 = 1.625 -1.25x + x2 = 1.625 The x term is -1.25x. Take half its coefficient (-0.625). Square it (0.390625) and add it to both sides. Add '0.390625' to each side of the equation. -1.25x + 0.390625 + x2 = 1.625 + 0.390625 Reorder the terms: 0.390625 + -1.25x + x2 = 1.625 + 0.390625 Combine like terms: 1.625 + 0.390625 = 2.015625 0.390625 + -1.25x + x2 = 2.015625 Factor a perfect square on the left side: (x + -0.625)(x + -0.625) = 2.015625 Calculate the square root of the right side: 1.419727086 Break this problem into two subproblems by setting (x + -0.625) equal to 1.419727086 and -1.419727086.Subproblem 1
x + -0.625 = 1.419727086 Simplifying x + -0.625 = 1.419727086 Reorder the terms: -0.625 + x = 1.419727086 Solving -0.625 + x = 1.419727086 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.625' to each side of the equation. -0.625 + 0.625 + x = 1.419727086 + 0.625 Combine like terms: -0.625 + 0.625 = 0.000 0.000 + x = 1.419727086 + 0.625 x = 1.419727086 + 0.625 Combine like terms: 1.419727086 + 0.625 = 2.044727086 x = 2.044727086 Simplifying x = 2.044727086Subproblem 2
x + -0.625 = -1.419727086 Simplifying x + -0.625 = -1.419727086 Reorder the terms: -0.625 + x = -1.419727086 Solving -0.625 + x = -1.419727086 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.625' to each side of the equation. -0.625 + 0.625 + x = -1.419727086 + 0.625 Combine like terms: -0.625 + 0.625 = 0.000 0.000 + x = -1.419727086 + 0.625 x = -1.419727086 + 0.625 Combine like terms: -1.419727086 + 0.625 = -0.794727086 x = -0.794727086 Simplifying x = -0.794727086Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.044727086, -0.794727086}
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