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Simplifying 0 = 3x2 + -12x + -5 Reorder the terms: 0 = -5 + -12x + 3x2 Solving 0 = -5 + -12x + 3x2 Solving for variable 'x'. Combine like terms: 0 + 5 = 5 5 + 12x + -3x2 = -5 + -12x + 3x2 + 5 + 12x + -3x2 Reorder the terms: 5 + 12x + -3x2 = -5 + 5 + -12x + 12x + 3x2 + -3x2 Combine like terms: -5 + 5 = 0 5 + 12x + -3x2 = 0 + -12x + 12x + 3x2 + -3x2 5 + 12x + -3x2 = -12x + 12x + 3x2 + -3x2 Combine like terms: -12x + 12x = 0 5 + 12x + -3x2 = 0 + 3x2 + -3x2 5 + 12x + -3x2 = 3x2 + -3x2 Combine like terms: 3x2 + -3x2 = 0 5 + 12x + -3x2 = 0 Begin completing the square. Divide all terms by -3 the coefficient of the squared term: Divide each side by '-3'. -1.666666667 + -4x + x2 = 0 Move the constant term to the right: Add '1.666666667' to each side of the equation. -1.666666667 + -4x + 1.666666667 + x2 = 0 + 1.666666667 Reorder the terms: -1.666666667 + 1.666666667 + -4x + x2 = 0 + 1.666666667 Combine like terms: -1.666666667 + 1.666666667 = 0.000000000 0.000000000 + -4x + x2 = 0 + 1.666666667 -4x + x2 = 0 + 1.666666667 Combine like terms: 0 + 1.666666667 = 1.666666667 -4x + x2 = 1.666666667 The x term is -4x. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4x + 4 + x2 = 1.666666667 + 4 Reorder the terms: 4 + -4x + x2 = 1.666666667 + 4 Combine like terms: 1.666666667 + 4 = 5.666666667 4 + -4x + x2 = 5.666666667 Factor a perfect square on the left side: (x + -2)(x + -2) = 5.666666667 Calculate the square root of the right side: 2.380476143 Break this problem into two subproblems by setting (x + -2) equal to 2.380476143 and -2.380476143.Subproblem 1
x + -2 = 2.380476143 Simplifying x + -2 = 2.380476143 Reorder the terms: -2 + x = 2.380476143 Solving -2 + x = 2.380476143 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 2.380476143 + 2 Combine like terms: -2 + 2 = 0 0 + x = 2.380476143 + 2 x = 2.380476143 + 2 Combine like terms: 2.380476143 + 2 = 4.380476143 x = 4.380476143 Simplifying x = 4.380476143Subproblem 2
x + -2 = -2.380476143 Simplifying x + -2 = -2.380476143 Reorder the terms: -2 + x = -2.380476143 Solving -2 + x = -2.380476143 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -2.380476143 + 2 Combine like terms: -2 + 2 = 0 0 + x = -2.380476143 + 2 x = -2.380476143 + 2 Combine like terms: -2.380476143 + 2 = -0.380476143 x = -0.380476143 Simplifying x = -0.380476143Solution
The solution to the problem is based on the solutions from the subproblems. x = {4.380476143, -0.380476143}
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