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Simplifying 20x2 + -1x + -8 = 0 Reorder the terms: -8 + -1x + 20x2 = 0 Solving -8 + -1x + 20x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 20 the coefficient of the squared term: Divide each side by '20'. -0.4 + -0.05x + x2 = 0 Move the constant term to the right: Add '0.4' to each side of the equation. -0.4 + -0.05x + 0.4 + x2 = 0 + 0.4 Reorder the terms: -0.4 + 0.4 + -0.05x + x2 = 0 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + -0.05x + x2 = 0 + 0.4 -0.05x + x2 = 0 + 0.4 Combine like terms: 0 + 0.4 = 0.4 -0.05x + x2 = 0.4 The x term is -0.05x. Take half its coefficient (-0.025). Square it (0.000625) and add it to both sides. Add '0.000625' to each side of the equation. -0.05x + 0.000625 + x2 = 0.4 + 0.000625 Reorder the terms: 0.000625 + -0.05x + x2 = 0.4 + 0.000625 Combine like terms: 0.4 + 0.000625 = 0.400625 0.000625 + -0.05x + x2 = 0.400625 Factor a perfect square on the left side: (x + -0.025)(x + -0.025) = 0.400625 Calculate the square root of the right side: 0.632949445 Break this problem into two subproblems by setting (x + -0.025) equal to 0.632949445 and -0.632949445.Subproblem 1
x + -0.025 = 0.632949445 Simplifying x + -0.025 = 0.632949445 Reorder the terms: -0.025 + x = 0.632949445 Solving -0.025 + x = 0.632949445 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.025' to each side of the equation. -0.025 + 0.025 + x = 0.632949445 + 0.025 Combine like terms: -0.025 + 0.025 = 0.000 0.000 + x = 0.632949445 + 0.025 x = 0.632949445 + 0.025 Combine like terms: 0.632949445 + 0.025 = 0.657949445 x = 0.657949445 Simplifying x = 0.657949445Subproblem 2
x + -0.025 = -0.632949445 Simplifying x + -0.025 = -0.632949445 Reorder the terms: -0.025 + x = -0.632949445 Solving -0.025 + x = -0.632949445 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.025' to each side of the equation. -0.025 + 0.025 + x = -0.632949445 + 0.025 Combine like terms: -0.025 + 0.025 = 0.000 0.000 + x = -0.632949445 + 0.025 x = -0.632949445 + 0.025 Combine like terms: -0.632949445 + 0.025 = -0.607949445 x = -0.607949445 Simplifying x = -0.607949445Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.657949445, -0.607949445}
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