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Simplifying x2 + 1.80x + -0.138 = 0 Reorder the terms: -0.138 + 1.80x + x2 = 0 Solving -0.138 + 1.80x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '0.138' to each side of the equation. -0.138 + 1.80x + 0.138 + x2 = 0 + 0.138 Reorder the terms: -0.138 + 0.138 + 1.80x + x2 = 0 + 0.138 Combine like terms: -0.138 + 0.138 = 0.000 0.000 + 1.80x + x2 = 0 + 0.138 1.80x + x2 = 0 + 0.138 Combine like terms: 0 + 0.138 = 0.138 1.80x + x2 = 0.138 The x term is 1.80x. 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. 1.80x + 0.81 + x2 = 0.138 + 0.81 Reorder the terms: 0.81 + 1.80x + x2 = 0.138 + 0.81 Combine like terms: 0.138 + 0.81 = 0.948 0.81 + 1.80x + x2 = 0.948 Factor a perfect square on the left side: (x + 0.9)(x + 0.9) = 0.948 Calculate the square root of the right side: 0.973652916 Break this problem into two subproblems by setting (x + 0.9) equal to 0.973652916 and -0.973652916.Subproblem 1
x + 0.9 = 0.973652916 Simplifying x + 0.9 = 0.973652916 Reorder the terms: 0.9 + x = 0.973652916 Solving 0.9 + x = 0.973652916 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 = 0.973652916 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = 0.973652916 + -0.9 x = 0.973652916 + -0.9 Combine like terms: 0.973652916 + -0.9 = 0.073652916 x = 0.073652916 Simplifying x = 0.073652916Subproblem 2
x + 0.9 = -0.973652916 Simplifying x + 0.9 = -0.973652916 Reorder the terms: 0.9 + x = -0.973652916 Solving 0.9 + x = -0.973652916 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 = -0.973652916 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = -0.973652916 + -0.9 x = -0.973652916 + -0.9 Combine like terms: -0.973652916 + -0.9 = -1.873652916 x = -1.873652916 Simplifying x = -1.873652916Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.073652916, -1.873652916}
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