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Simplifying 3x[7x2 + -2(x + -2)] = 0 Reorder the terms: 3x[7x2 + -2(-2 + x)] = 0 3x[7x2 + (-2 * -2 + x * -2)] = 0 3x[7x2 + (4 + -2x)] = 0 Reorder the terms: 3x[4 + -2x + 7x2] = 0 [4 * 3x + -2x * 3x + 7x2 * 3x] = 0 [12x + -6x2 + 21x3] = 0 Solving 12x + -6x2 + 21x3 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '3x'. 3x(4 + -2x + 7x2) = 0 Ignore the factor 3.Subproblem 1
Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0Subproblem 2
Set the factor '(4 + -2x + 7x2)' equal to zero and attempt to solve: Simplifying 4 + -2x + 7x2 = 0 Solving 4 + -2x + 7x2 = 0 Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. 0.5714285714 + -0.2857142857x + x2 = 0 Move the constant term to the right: Add '-0.5714285714' to each side of the equation. 0.5714285714 + -0.2857142857x + -0.5714285714 + x2 = 0 + -0.5714285714 Reorder the terms: 0.5714285714 + -0.5714285714 + -0.2857142857x + x2 = 0 + -0.5714285714 Combine like terms: 0.5714285714 + -0.5714285714 = 0.0000000000 0.0000000000 + -0.2857142857x + x2 = 0 + -0.5714285714 -0.2857142857x + x2 = 0 + -0.5714285714 Combine like terms: 0 + -0.5714285714 = -0.5714285714 -0.2857142857x + x2 = -0.5714285714 The x term is -0.2857142857x. Take half its coefficient (-0.1428571429). Square it (0.02040816328) and add it to both sides. Add '0.02040816328' to each side of the equation. -0.2857142857x + 0.02040816328 + x2 = -0.5714285714 + 0.02040816328 Reorder the terms: 0.02040816328 + -0.2857142857x + x2 = -0.5714285714 + 0.02040816328 Combine like terms: -0.5714285714 + 0.02040816328 = -0.55102040812 0.02040816328 + -0.2857142857x + x2 = -0.55102040812 Factor a perfect square on the left side: (x + -0.1428571429)(x + -0.1428571429) = -0.55102040812 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.Solution
x = {0}
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