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Simplifying -3x(x + -4) = 8 + -3x Reorder the terms: -3x(-4 + x) = 8 + -3x (-4 * -3x + x * -3x) = 8 + -3x (12x + -3x2) = 8 + -3x Solving 12x + -3x2 = 8 + -3x Solving for variable 'x'. Reorder the terms: -8 + 12x + 3x + -3x2 = 8 + -3x + -8 + 3x Combine like terms: 12x + 3x = 15x -8 + 15x + -3x2 = 8 + -3x + -8 + 3x Reorder the terms: -8 + 15x + -3x2 = 8 + -8 + -3x + 3x Combine like terms: 8 + -8 = 0 -8 + 15x + -3x2 = 0 + -3x + 3x -8 + 15x + -3x2 = -3x + 3x Combine like terms: -3x + 3x = 0 -8 + 15x + -3x2 = 0 Begin completing the square. Divide all terms by -3 the coefficient of the squared term: Divide each side by '-3'. 2.666666667 + -5x + x2 = 0 Move the constant term to the right: Add '-2.666666667' to each side of the equation. 2.666666667 + -5x + -2.666666667 + x2 = 0 + -2.666666667 Reorder the terms: 2.666666667 + -2.666666667 + -5x + x2 = 0 + -2.666666667 Combine like terms: 2.666666667 + -2.666666667 = 0.000000000 0.000000000 + -5x + x2 = 0 + -2.666666667 -5x + x2 = 0 + -2.666666667 Combine like terms: 0 + -2.666666667 = -2.666666667 -5x + x2 = -2.666666667 The x term is -5x. Take half its coefficient (-2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. -5x + 6.25 + x2 = -2.666666667 + 6.25 Reorder the terms: 6.25 + -5x + x2 = -2.666666667 + 6.25 Combine like terms: -2.666666667 + 6.25 = 3.583333333 6.25 + -5x + x2 = 3.583333333 Factor a perfect square on the left side: (x + -2.5)(x + -2.5) = 3.583333333 Calculate the square root of the right side: 1.892969449 Break this problem into two subproblems by setting (x + -2.5) equal to 1.892969449 and -1.892969449.Subproblem 1
x + -2.5 = 1.892969449 Simplifying x + -2.5 = 1.892969449 Reorder the terms: -2.5 + x = 1.892969449 Solving -2.5 + x = 1.892969449 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 1.892969449 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 1.892969449 + 2.5 x = 1.892969449 + 2.5 Combine like terms: 1.892969449 + 2.5 = 4.392969449 x = 4.392969449 Simplifying x = 4.392969449Subproblem 2
x + -2.5 = -1.892969449 Simplifying x + -2.5 = -1.892969449 Reorder the terms: -2.5 + x = -1.892969449 Solving -2.5 + x = -1.892969449 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -1.892969449 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -1.892969449 + 2.5 x = -1.892969449 + 2.5 Combine like terms: -1.892969449 + 2.5 = 0.607030551 x = 0.607030551 Simplifying x = 0.607030551Solution
The solution to the problem is based on the solutions from the subproblems. x = {4.392969449, 0.607030551}
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