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Simplifying (-4x + 3) + (-2x2 + 8) = 0 Reorder the terms: (3 + -4x) + (-2x2 + 8) = 0 Remove parenthesis around (3 + -4x) 3 + -4x + (-2x2 + 8) = 0 Reorder the terms: 3 + -4x + (8 + -2x2) = 0 Remove parenthesis around (8 + -2x2) 3 + -4x + 8 + -2x2 = 0 Reorder the terms: 3 + 8 + -4x + -2x2 = 0 Combine like terms: 3 + 8 = 11 11 + -4x + -2x2 = 0 Solving 11 + -4x + -2x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -2 the coefficient of the squared term: Divide each side by '-2'. -5.5 + 2x + x2 = 0 Move the constant term to the right: Add '5.5' to each side of the equation. -5.5 + 2x + 5.5 + x2 = 0 + 5.5 Reorder the terms: -5.5 + 5.5 + 2x + x2 = 0 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + 2x + x2 = 0 + 5.5 2x + x2 = 0 + 5.5 Combine like terms: 0 + 5.5 = 5.5 2x + x2 = 5.5 The x term is 2x. Take half its coefficient (1). Square it (1) and add it to both sides. Add '1' to each side of the equation. 2x + 1 + x2 = 5.5 + 1 Reorder the terms: 1 + 2x + x2 = 5.5 + 1 Combine like terms: 5.5 + 1 = 6.5 1 + 2x + x2 = 6.5 Factor a perfect square on the left side: (x + 1)(x + 1) = 6.5 Calculate the square root of the right side: 2.549509757 Break this problem into two subproblems by setting (x + 1) equal to 2.549509757 and -2.549509757.Subproblem 1
x + 1 = 2.549509757 Simplifying x + 1 = 2.549509757 Reorder the terms: 1 + x = 2.549509757 Solving 1 + x = 2.549509757 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 2.549509757 + -1 Combine like terms: 1 + -1 = 0 0 + x = 2.549509757 + -1 x = 2.549509757 + -1 Combine like terms: 2.549509757 + -1 = 1.549509757 x = 1.549509757 Simplifying x = 1.549509757Subproblem 2
x + 1 = -2.549509757 Simplifying x + 1 = -2.549509757 Reorder the terms: 1 + x = -2.549509757 Solving 1 + x = -2.549509757 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -2.549509757 + -1 Combine like terms: 1 + -1 = 0 0 + x = -2.549509757 + -1 x = -2.549509757 + -1 Combine like terms: -2.549509757 + -1 = -3.549509757 x = -3.549509757 Simplifying x = -3.549509757Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.549509757, -3.549509757}
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