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Simplifying -3x2 + -24x + -40 = 0 Reorder the terms: -40 + -24x + -3x2 = 0 Solving -40 + -24x + -3x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '-1'. -1(40 + 24x + 3x2) = 0 Ignore the factor -1.Subproblem 1
Set the factor '(40 + 24x + 3x2)' equal to zero and attempt to solve: Simplifying 40 + 24x + 3x2 = 0 Solving 40 + 24x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 13.33333333 + 8x + x2 = 0 Move the constant term to the right: Add '-13.33333333' to each side of the equation. 13.33333333 + 8x + -13.33333333 + x2 = 0 + -13.33333333 Reorder the terms: 13.33333333 + -13.33333333 + 8x + x2 = 0 + -13.33333333 Combine like terms: 13.33333333 + -13.33333333 = 0.00000000 0.00000000 + 8x + x2 = 0 + -13.33333333 8x + x2 = 0 + -13.33333333 Combine like terms: 0 + -13.33333333 = -13.33333333 8x + x2 = -13.33333333 The x term is 8x. Take half its coefficient (4). Square it (16) and add it to both sides. Add '16' to each side of the equation. 8x + 16 + x2 = -13.33333333 + 16 Reorder the terms: 16 + 8x + x2 = -13.33333333 + 16 Combine like terms: -13.33333333 + 16 = 2.66666667 16 + 8x + x2 = 2.66666667 Factor a perfect square on the left side: (x + 4)(x + 4) = 2.66666667 Calculate the square root of the right side: 1.632993163 Break this problem into two subproblems by setting (x + 4) equal to 1.632993163 and -1.632993163.Subproblem 1
x + 4 = 1.632993163 Simplifying x + 4 = 1.632993163 Reorder the terms: 4 + x = 1.632993163 Solving 4 + x = 1.632993163 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 1.632993163 + -4 Combine like terms: 4 + -4 = 0 0 + x = 1.632993163 + -4 x = 1.632993163 + -4 Combine like terms: 1.632993163 + -4 = -2.367006837 x = -2.367006837 Simplifying x = -2.367006837Subproblem 2
x + 4 = -1.632993163 Simplifying x + 4 = -1.632993163 Reorder the terms: 4 + x = -1.632993163 Solving 4 + x = -1.632993163 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = -1.632993163 + -4 Combine like terms: 4 + -4 = 0 0 + x = -1.632993163 + -4 x = -1.632993163 + -4 Combine like terms: -1.632993163 + -4 = -5.632993163 x = -5.632993163 Simplifying x = -5.632993163Solution
The solution to the problem is based on the solutions from the subproblems. x = {-2.367006837, -5.632993163}Solution
x = {-2.367006837, -5.632993163}
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