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Simplifying 25x2 + -20x + -8 = 0 Reorder the terms: -8 + -20x + 25x2 = 0 Solving -8 + -20x + 25x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 25 the coefficient of the squared term: Divide each side by '25'. -0.32 + -0.8x + x2 = 0 Move the constant term to the right: Add '0.32' to each side of the equation. -0.32 + -0.8x + 0.32 + x2 = 0 + 0.32 Reorder the terms: -0.32 + 0.32 + -0.8x + x2 = 0 + 0.32 Combine like terms: -0.32 + 0.32 = 0.00 0.00 + -0.8x + x2 = 0 + 0.32 -0.8x + x2 = 0 + 0.32 Combine like terms: 0 + 0.32 = 0.32 -0.8x + x2 = 0.32 The x term is -0.8x. Take half its coefficient (-0.4). Square it (0.16) and add it to both sides. Add '0.16' to each side of the equation. -0.8x + 0.16 + x2 = 0.32 + 0.16 Reorder the terms: 0.16 + -0.8x + x2 = 0.32 + 0.16 Combine like terms: 0.32 + 0.16 = 0.48 0.16 + -0.8x + x2 = 0.48 Factor a perfect square on the left side: (x + -0.4)(x + -0.4) = 0.48 Calculate the square root of the right side: 0.692820323 Break this problem into two subproblems by setting (x + -0.4) equal to 0.692820323 and -0.692820323.Subproblem 1
x + -0.4 = 0.692820323 Simplifying x + -0.4 = 0.692820323 Reorder the terms: -0.4 + x = 0.692820323 Solving -0.4 + x = 0.692820323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + x = 0.692820323 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + x = 0.692820323 + 0.4 x = 0.692820323 + 0.4 Combine like terms: 0.692820323 + 0.4 = 1.092820323 x = 1.092820323 Simplifying x = 1.092820323Subproblem 2
x + -0.4 = -0.692820323 Simplifying x + -0.4 = -0.692820323 Reorder the terms: -0.4 + x = -0.692820323 Solving -0.4 + x = -0.692820323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + x = -0.692820323 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + x = -0.692820323 + 0.4 x = -0.692820323 + 0.4 Combine like terms: -0.692820323 + 0.4 = -0.292820323 x = -0.292820323 Simplifying x = -0.292820323Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.092820323, -0.292820323}
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