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Simplifying 3x3 + 21x2 + 12x = 0 Reorder the terms: 12x + 21x2 + 3x3 = 0 Solving 12x + 21x2 + 3x3 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '3x'. 3x(4 + 7x + x2) = 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 + 7x + x2)' equal to zero and attempt to solve: Simplifying 4 + 7x + x2 = 0 Solving 4 + 7x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-4' to each side of the equation. 4 + 7x + -4 + x2 = 0 + -4 Reorder the terms: 4 + -4 + 7x + x2 = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 7x + x2 = 0 + -4 7x + x2 = 0 + -4 Combine like terms: 0 + -4 = -4 7x + x2 = -4 The x term is 7x. Take half its coefficient (3.5). Square it (12.25) and add it to both sides. Add '12.25' to each side of the equation. 7x + 12.25 + x2 = -4 + 12.25 Reorder the terms: 12.25 + 7x + x2 = -4 + 12.25 Combine like terms: -4 + 12.25 = 8.25 12.25 + 7x + x2 = 8.25 Factor a perfect square on the left side: (x + 3.5)(x + 3.5) = 8.25 Calculate the square root of the right side: 2.872281323 Break this problem into two subproblems by setting (x + 3.5) equal to 2.872281323 and -2.872281323.Subproblem 1
x + 3.5 = 2.872281323 Simplifying x + 3.5 = 2.872281323 Reorder the terms: 3.5 + x = 2.872281323 Solving 3.5 + x = 2.872281323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = 2.872281323 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 2.872281323 + -3.5 x = 2.872281323 + -3.5 Combine like terms: 2.872281323 + -3.5 = -0.627718677 x = -0.627718677 Simplifying x = -0.627718677Subproblem 2
x + 3.5 = -2.872281323 Simplifying x + 3.5 = -2.872281323 Reorder the terms: 3.5 + x = -2.872281323 Solving 3.5 + x = -2.872281323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = -2.872281323 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -2.872281323 + -3.5 x = -2.872281323 + -3.5 Combine like terms: -2.872281323 + -3.5 = -6.372281323 x = -6.372281323 Simplifying x = -6.372281323Solution
The solution to the problem is based on the solutions from the subproblems. x = {-0.627718677, -6.372281323}Solution
x = {0, -0.627718677, -6.372281323}
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