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Simplifying 9x2 + -19x + -4 = 0 Reorder the terms: -4 + -19x + 9x2 = 0 Solving -4 + -19x + 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'. -0.4444444444 + -2.111111111x + x2 = 0 Move the constant term to the right: Add '0.4444444444' to each side of the equation. -0.4444444444 + -2.111111111x + 0.4444444444 + x2 = 0 + 0.4444444444 Reorder the terms: -0.4444444444 + 0.4444444444 + -2.111111111x + x2 = 0 + 0.4444444444 Combine like terms: -0.4444444444 + 0.4444444444 = 0.0000000000 0.0000000000 + -2.111111111x + x2 = 0 + 0.4444444444 -2.111111111x + x2 = 0 + 0.4444444444 Combine like terms: 0 + 0.4444444444 = 0.4444444444 -2.111111111x + x2 = 0.4444444444 The x term is -2.111111111x. Take half its coefficient (-1.055555556). Square it (1.114197532) and add it to both sides. Add '1.114197532' to each side of the equation. -2.111111111x + 1.114197532 + x2 = 0.4444444444 + 1.114197532 Reorder the terms: 1.114197532 + -2.111111111x + x2 = 0.4444444444 + 1.114197532 Combine like terms: 0.4444444444 + 1.114197532 = 1.5586419764 1.114197532 + -2.111111111x + x2 = 1.5586419764 Factor a perfect square on the left side: (x + -1.055555556)(x + -1.055555556) = 1.5586419764 Calculate the square root of the right side: 1.248455837 Break this problem into two subproblems by setting (x + -1.055555556) equal to 1.248455837 and -1.248455837.Subproblem 1
x + -1.055555556 = 1.248455837 Simplifying x + -1.055555556 = 1.248455837 Reorder the terms: -1.055555556 + x = 1.248455837 Solving -1.055555556 + x = 1.248455837 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.055555556' to each side of the equation. -1.055555556 + 1.055555556 + x = 1.248455837 + 1.055555556 Combine like terms: -1.055555556 + 1.055555556 = 0.000000000 0.000000000 + x = 1.248455837 + 1.055555556 x = 1.248455837 + 1.055555556 Combine like terms: 1.248455837 + 1.055555556 = 2.304011393 x = 2.304011393 Simplifying x = 2.304011393Subproblem 2
x + -1.055555556 = -1.248455837 Simplifying x + -1.055555556 = -1.248455837 Reorder the terms: -1.055555556 + x = -1.248455837 Solving -1.055555556 + x = -1.248455837 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.055555556' to each side of the equation. -1.055555556 + 1.055555556 + x = -1.248455837 + 1.055555556 Combine like terms: -1.055555556 + 1.055555556 = 0.000000000 0.000000000 + x = -1.248455837 + 1.055555556 x = -1.248455837 + 1.055555556 Combine like terms: -1.248455837 + 1.055555556 = -0.192900281 x = -0.192900281 Simplifying x = -0.192900281Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.304011393, -0.192900281}
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