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Simplifying x(1.8 + x) = 0.19 (1.8 * x + x * x) = 0.19 (1.8x + x2) = 0.19 Solving 1.8x + x2 = 0.19 Solving for variable 'x'. Reorder the terms: -0.19 + 1.8x + x2 = 0.19 + -0.19 Combine like terms: 0.19 + -0.19 = 0.00 -0.19 + 1.8x + x2 = 0.00 Begin completing the square. Move the constant term to the right: Add '0.19' to each side of the equation. -0.19 + 1.8x + 0.19 + x2 = 0.00 + 0.19 Reorder the terms: -0.19 + 0.19 + 1.8x + x2 = 0.00 + 0.19 Combine like terms: -0.19 + 0.19 = 0.00 0.00 + 1.8x + x2 = 0.00 + 0.19 1.8x + x2 = 0.00 + 0.19 Combine like terms: 0.00 + 0.19 = 0.19 1.8x + x2 = 0.19 The x term is 1.8x. Take half its coefficient (0.9). Square it (0.81) and add it to both sides. Add '0.81' to each side of the equation. 1.8x + 0.81 + x2 = 0.19 + 0.81 Reorder the terms: 0.81 + 1.8x + x2 = 0.19 + 0.81 Combine like terms: 0.19 + 0.81 = 1 0.81 + 1.8x + x2 = 1 Factor a perfect square on the left side: (x + 0.9)(x + 0.9) = 1 Calculate the square root of the right side: 1 Break this problem into two subproblems by setting (x + 0.9) equal to 1 and -1.Subproblem 1
x + 0.9 = 1 Simplifying x + 0.9 = 1 Reorder the terms: 0.9 + x = 1 Solving 0.9 + x = 1 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = 1 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = 1 + -0.9 x = 1 + -0.9 Combine like terms: 1 + -0.9 = 0.1 x = 0.1 Simplifying x = 0.1Subproblem 2
x + 0.9 = -1 Simplifying x + 0.9 = -1 Reorder the terms: 0.9 + x = -1 Solving 0.9 + x = -1 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = -1 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = -1 + -0.9 x = -1 + -0.9 Combine like terms: -1 + -0.9 = -1.9 x = -1.9 Simplifying x = -1.9Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.1, -1.9}
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