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Simplifying -4x2 + 3x + 12 = 0 Reorder the terms: 12 + 3x + -4x2 = 0 Solving 12 + 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'. -3 + -0.75x + x2 = 0 Move the constant term to the right: Add '3' to each side of the equation. -3 + -0.75x + 3 + x2 = 0 + 3 Reorder the terms: -3 + 3 + -0.75x + x2 = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -0.75x + x2 = 0 + 3 -0.75x + x2 = 0 + 3 Combine like terms: 0 + 3 = 3 -0.75x + x2 = 3 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 = 3 + 0.140625 Reorder the terms: 0.140625 + -0.75x + x2 = 3 + 0.140625 Combine like terms: 3 + 0.140625 = 3.140625 0.140625 + -0.75x + x2 = 3.140625 Factor a perfect square on the left side: (x + -0.375)(x + -0.375) = 3.140625 Calculate the square root of the right side: 1.77218086 Break this problem into two subproblems by setting (x + -0.375) equal to 1.77218086 and -1.77218086.Subproblem 1
x + -0.375 = 1.77218086 Simplifying x + -0.375 = 1.77218086 Reorder the terms: -0.375 + x = 1.77218086 Solving -0.375 + x = 1.77218086 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 = 1.77218086 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + x = 1.77218086 + 0.375 x = 1.77218086 + 0.375 Combine like terms: 1.77218086 + 0.375 = 2.14718086 x = 2.14718086 Simplifying x = 2.14718086Subproblem 2
x + -0.375 = -1.77218086 Simplifying x + -0.375 = -1.77218086 Reorder the terms: -0.375 + x = -1.77218086 Solving -0.375 + x = -1.77218086 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 = -1.77218086 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + x = -1.77218086 + 0.375 x = -1.77218086 + 0.375 Combine like terms: -1.77218086 + 0.375 = -1.39718086 x = -1.39718086 Simplifying x = -1.39718086Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.14718086, -1.39718086}
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