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Simplifying x2 + -0.5x + -2.1875 = 0 Reorder the terms: -2.1875 + -0.5x + x2 = 0 Solving -2.1875 + -0.5x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '2.1875' to each side of the equation. -2.1875 + -0.5x + 2.1875 + x2 = 0 + 2.1875 Reorder the terms: -2.1875 + 2.1875 + -0.5x + x2 = 0 + 2.1875 Combine like terms: -2.1875 + 2.1875 = 0.0000 0.0000 + -0.5x + x2 = 0 + 2.1875 -0.5x + x2 = 0 + 2.1875 Combine like terms: 0 + 2.1875 = 2.1875 -0.5x + x2 = 2.1875 The x term is -0.5x. Take half its coefficient (-0.25). Square it (0.0625) and add it to both sides. Add '0.0625' to each side of the equation. -0.5x + 0.0625 + x2 = 2.1875 + 0.0625 Reorder the terms: 0.0625 + -0.5x + x2 = 2.1875 + 0.0625 Combine like terms: 2.1875 + 0.0625 = 2.25 0.0625 + -0.5x + x2 = 2.25 Factor a perfect square on the left side: (x + -0.25)(x + -0.25) = 2.25 Calculate the square root of the right side: 1.5 Break this problem into two subproblems by setting (x + -0.25) equal to 1.5 and -1.5.Subproblem 1
x + -0.25 = 1.5 Simplifying x + -0.25 = 1.5 Reorder the terms: -0.25 + x = 1.5 Solving -0.25 + x = 1.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 1.5 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 1.5 + 0.25 x = 1.5 + 0.25 Combine like terms: 1.5 + 0.25 = 1.75 x = 1.75 Simplifying x = 1.75Subproblem 2
x + -0.25 = -1.5 Simplifying x + -0.25 = -1.5 Reorder the terms: -0.25 + x = -1.5 Solving -0.25 + x = -1.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -1.5 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -1.5 + 0.25 x = -1.5 + 0.25 Combine like terms: -1.5 + 0.25 = -1.25 x = -1.25 Simplifying x = -1.25Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.75, -1.25}
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