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Simplifying 9x2 + 10x + -10 = 0 Reorder the terms: -10 + 10x + 9x2 = 0 Solving -10 + 10x + 9x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 9 the coefficient of the squared term: Divide each side by '9'. -1.111111111 + 1.111111111x + x2 = 0 Move the constant term to the right: Add '1.111111111' to each side of the equation. -1.111111111 + 1.111111111x + 1.111111111 + x2 = 0 + 1.111111111 Reorder the terms: -1.111111111 + 1.111111111 + 1.111111111x + x2 = 0 + 1.111111111 Combine like terms: -1.111111111 + 1.111111111 = 0.000000000 0.000000000 + 1.111111111x + x2 = 0 + 1.111111111 1.111111111x + x2 = 0 + 1.111111111 Combine like terms: 0 + 1.111111111 = 1.111111111 1.111111111x + x2 = 1.111111111 The x term is 1.111111111x. Take half its coefficient (0.5555555555). Square it (0.3086419752) and add it to both sides. Add '0.3086419752' to each side of the equation. 1.111111111x + 0.3086419752 + x2 = 1.111111111 + 0.3086419752 Reorder the terms: 0.3086419752 + 1.111111111x + x2 = 1.111111111 + 0.3086419752 Combine like terms: 1.111111111 + 0.3086419752 = 1.4197530862 0.3086419752 + 1.111111111x + x2 = 1.4197530862 Factor a perfect square on the left side: (x + 0.5555555555)(x + 0.5555555555) = 1.4197530862 Calculate the square root of the right side: 1.191533922 Break this problem into two subproblems by setting (x + 0.5555555555) equal to 1.191533922 and -1.191533922.Subproblem 1
x + 0.5555555555 = 1.191533922 Simplifying x + 0.5555555555 = 1.191533922 Reorder the terms: 0.5555555555 + x = 1.191533922 Solving 0.5555555555 + x = 1.191533922 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5555555555' to each side of the equation. 0.5555555555 + -0.5555555555 + x = 1.191533922 + -0.5555555555 Combine like terms: 0.5555555555 + -0.5555555555 = 0.0000000000 0.0000000000 + x = 1.191533922 + -0.5555555555 x = 1.191533922 + -0.5555555555 Combine like terms: 1.191533922 + -0.5555555555 = 0.6359783665 x = 0.6359783665 Simplifying x = 0.6359783665Subproblem 2
x + 0.5555555555 = -1.191533922 Simplifying x + 0.5555555555 = -1.191533922 Reorder the terms: 0.5555555555 + x = -1.191533922 Solving 0.5555555555 + x = -1.191533922 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5555555555' to each side of the equation. 0.5555555555 + -0.5555555555 + x = -1.191533922 + -0.5555555555 Combine like terms: 0.5555555555 + -0.5555555555 = 0.0000000000 0.0000000000 + x = -1.191533922 + -0.5555555555 x = -1.191533922 + -0.5555555555 Combine like terms: -1.191533922 + -0.5555555555 = -1.7470894775 x = -1.7470894775 Simplifying x = -1.7470894775Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.6359783665, -1.7470894775}
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