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Simplifying 3x + -4x2 = -11 Solving 3x + -4x2 = -11 Solving for variable 'x'. Reorder the terms: 11 + 3x + -4x2 = -11 + 11 Combine like terms: -11 + 11 = 0 11 + 3x + -4x2 = 0 Begin completing the square. Divide all terms by -4 the coefficient of the squared term: Divide each side by '-4'. -2.75 + -0.75x + x2 = 0 Move the constant term to the right: Add '2.75' to each side of the equation. -2.75 + -0.75x + 2.75 + x2 = 0 + 2.75 Reorder the terms: -2.75 + 2.75 + -0.75x + x2 = 0 + 2.75 Combine like terms: -2.75 + 2.75 = 0.00 0.00 + -0.75x + x2 = 0 + 2.75 -0.75x + x2 = 0 + 2.75 Combine like terms: 0 + 2.75 = 2.75 -0.75x + x2 = 2.75 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 = 2.75 + 0.140625 Reorder the terms: 0.140625 + -0.75x + x2 = 2.75 + 0.140625 Combine like terms: 2.75 + 0.140625 = 2.890625 0.140625 + -0.75x + x2 = 2.890625 Factor a perfect square on the left side: (x + -0.375)(x + -0.375) = 2.890625 Calculate the square root of the right side: 1.700183814 Break this problem into two subproblems by setting (x + -0.375) equal to 1.700183814 and -1.700183814.Subproblem 1
x + -0.375 = 1.700183814 Simplifying x + -0.375 = 1.700183814 Reorder the terms: -0.375 + x = 1.700183814 Solving -0.375 + x = 1.700183814 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 = 1.700183814 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + x = 1.700183814 + 0.375 x = 1.700183814 + 0.375 Combine like terms: 1.700183814 + 0.375 = 2.075183814 x = 2.075183814 Simplifying x = 2.075183814Subproblem 2
x + -0.375 = -1.700183814 Simplifying x + -0.375 = -1.700183814 Reorder the terms: -0.375 + x = -1.700183814 Solving -0.375 + x = -1.700183814 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 = -1.700183814 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + x = -1.700183814 + 0.375 x = -1.700183814 + 0.375 Combine like terms: -1.700183814 + 0.375 = -1.325183814 x = -1.325183814 Simplifying x = -1.325183814Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.075183814, -1.325183814}
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