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Simplifying 4x2 + 3x + -2.5 = 0 Reorder the terms: -2.5 + 3x + 4x2 = 0 Solving -2.5 + 3x + 4x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -0.625 + 0.75x + x2 = 0 Move the constant term to the right: Add '0.625' to each side of the equation. -0.625 + 0.75x + 0.625 + x2 = 0 + 0.625 Reorder the terms: -0.625 + 0.625 + 0.75x + x2 = 0 + 0.625 Combine like terms: -0.625 + 0.625 = 0.000 0.000 + 0.75x + x2 = 0 + 0.625 0.75x + x2 = 0 + 0.625 Combine like terms: 0 + 0.625 = 0.625 0.75x + x2 = 0.625 The x term is 0.75x. Take half its coefficient (0.375). Square it (0.140625) and add it to both sides. Add '0.140625' to each side of the equation. 0.75x + 0.140625 + x2 = 0.625 + 0.140625 Reorder the terms: 0.140625 + 0.75x + x2 = 0.625 + 0.140625 Combine like terms: 0.625 + 0.140625 = 0.765625 0.140625 + 0.75x + x2 = 0.765625 Factor a perfect square on the left side: (x + 0.375)(x + 0.375) = 0.765625 Calculate the square root of the right side: 0.875 Break this problem into two subproblems by setting (x + 0.375) equal to 0.875 and -0.875.Subproblem 1
x + 0.375 = 0.875 Simplifying x + 0.375 = 0.875 Reorder the terms: 0.375 + x = 0.875 Solving 0.375 + x = 0.875 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + x = 0.875 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = 0.875 + -0.375 x = 0.875 + -0.375 Combine like terms: 0.875 + -0.375 = 0.5 x = 0.5 Simplifying x = 0.5Subproblem 2
x + 0.375 = -0.875 Simplifying x + 0.375 = -0.875 Reorder the terms: 0.375 + x = -0.875 Solving 0.375 + x = -0.875 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + x = -0.875 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = -0.875 + -0.375 x = -0.875 + -0.375 Combine like terms: -0.875 + -0.375 = -1.25 x = -1.25 Simplifying x = -1.25Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.5, -1.25}
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