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Simplifying 9x2 + 4x + -8 = 0 Reorder the terms: -8 + 4x + 9x2 = 0 Solving -8 + 4x + 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'. -0.8888888889 + 0.4444444444x + x2 = 0 Move the constant term to the right: Add '0.8888888889' to each side of the equation. -0.8888888889 + 0.4444444444x + 0.8888888889 + x2 = 0 + 0.8888888889 Reorder the terms: -0.8888888889 + 0.8888888889 + 0.4444444444x + x2 = 0 + 0.8888888889 Combine like terms: -0.8888888889 + 0.8888888889 = 0.0000000000 0.0000000000 + 0.4444444444x + x2 = 0 + 0.8888888889 0.4444444444x + x2 = 0 + 0.8888888889 Combine like terms: 0 + 0.8888888889 = 0.8888888889 0.4444444444x + x2 = 0.8888888889 The x term is 0.4444444444x. Take half its coefficient (0.2222222222). Square it (0.04938271604) and add it to both sides. Add '0.04938271604' to each side of the equation. 0.4444444444x + 0.04938271604 + x2 = 0.8888888889 + 0.04938271604 Reorder the terms: 0.04938271604 + 0.4444444444x + x2 = 0.8888888889 + 0.04938271604 Combine like terms: 0.8888888889 + 0.04938271604 = 0.93827160494 0.04938271604 + 0.4444444444x + x2 = 0.93827160494 Factor a perfect square on the left side: (x + 0.2222222222)(x + 0.2222222222) = 0.93827160494 Calculate the square root of the right side: 0.96864421 Break this problem into two subproblems by setting (x + 0.2222222222) equal to 0.96864421 and -0.96864421.Subproblem 1
x + 0.2222222222 = 0.96864421 Simplifying x + 0.2222222222 = 0.96864421 Reorder the terms: 0.2222222222 + x = 0.96864421 Solving 0.2222222222 + x = 0.96864421 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2222222222' to each side of the equation. 0.2222222222 + -0.2222222222 + x = 0.96864421 + -0.2222222222 Combine like terms: 0.2222222222 + -0.2222222222 = 0.0000000000 0.0000000000 + x = 0.96864421 + -0.2222222222 x = 0.96864421 + -0.2222222222 Combine like terms: 0.96864421 + -0.2222222222 = 0.7464219878 x = 0.7464219878 Simplifying x = 0.7464219878Subproblem 2
x + 0.2222222222 = -0.96864421 Simplifying x + 0.2222222222 = -0.96864421 Reorder the terms: 0.2222222222 + x = -0.96864421 Solving 0.2222222222 + x = -0.96864421 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2222222222' to each side of the equation. 0.2222222222 + -0.2222222222 + x = -0.96864421 + -0.2222222222 Combine like terms: 0.2222222222 + -0.2222222222 = 0.0000000000 0.0000000000 + x = -0.96864421 + -0.2222222222 x = -0.96864421 + -0.2222222222 Combine like terms: -0.96864421 + -0.2222222222 = -1.1908664322 x = -1.1908664322 Simplifying x = -1.1908664322Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.7464219878, -1.1908664322}
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