-12x^3-16x^2+400x=0

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Solution for -12x^3-16x^2+400x=0 equation:


Simplifying
-12x3 + -16x2 + 400x = 0

Reorder the terms:
400x + -16x2 + -12x3 = 0

Solving
400x + -16x2 + -12x3 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '4x'.
4x(100 + -4x + -3x2) = 0

Ignore the factor 4.

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 = 0

Subproblem 2

Set the factor '(100 + -4x + -3x2)' equal to zero and attempt to solve: Simplifying 100 + -4x + -3x2 = 0 Solving 100 + -4x + -3x2 = 0 Begin completing the square. Divide all terms by -3 the coefficient of the squared term: Divide each side by '-3'. -33.33333333 + 1.333333333x + x2 = 0 Move the constant term to the right: Add '33.33333333' to each side of the equation. -33.33333333 + 1.333333333x + 33.33333333 + x2 = 0 + 33.33333333 Reorder the terms: -33.33333333 + 33.33333333 + 1.333333333x + x2 = 0 + 33.33333333 Combine like terms: -33.33333333 + 33.33333333 = 0.00000000 0.00000000 + 1.333333333x + x2 = 0 + 33.33333333 1.333333333x + x2 = 0 + 33.33333333 Combine like terms: 0 + 33.33333333 = 33.33333333 1.333333333x + x2 = 33.33333333 The x term is 1.333333333x. Take half its coefficient (0.6666666665). Square it (0.4444444442) and add it to both sides. Add '0.4444444442' to each side of the equation. 1.333333333x + 0.4444444442 + x2 = 33.33333333 + 0.4444444442 Reorder the terms: 0.4444444442 + 1.333333333x + x2 = 33.33333333 + 0.4444444442 Combine like terms: 33.33333333 + 0.4444444442 = 33.7777777742 0.4444444442 + 1.333333333x + x2 = 33.7777777742 Factor a perfect square on the left side: (x + 0.6666666665)(x + 0.6666666665) = 33.7777777742 Calculate the square root of the right side: 5.811865258 Break this problem into two subproblems by setting (x + 0.6666666665) equal to 5.811865258 and -5.811865258.

Subproblem 1

x + 0.6666666665 = 5.811865258 Simplifying x + 0.6666666665 = 5.811865258 Reorder the terms: 0.6666666665 + x = 5.811865258 Solving 0.6666666665 + x = 5.811865258 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6666666665' to each side of the equation. 0.6666666665 + -0.6666666665 + x = 5.811865258 + -0.6666666665 Combine like terms: 0.6666666665 + -0.6666666665 = 0.0000000000 0.0000000000 + x = 5.811865258 + -0.6666666665 x = 5.811865258 + -0.6666666665 Combine like terms: 5.811865258 + -0.6666666665 = 5.1451985915 x = 5.1451985915 Simplifying x = 5.1451985915

Subproblem 2

x + 0.6666666665 = -5.811865258 Simplifying x + 0.6666666665 = -5.811865258 Reorder the terms: 0.6666666665 + x = -5.811865258 Solving 0.6666666665 + x = -5.811865258 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6666666665' to each side of the equation. 0.6666666665 + -0.6666666665 + x = -5.811865258 + -0.6666666665 Combine like terms: 0.6666666665 + -0.6666666665 = 0.0000000000 0.0000000000 + x = -5.811865258 + -0.6666666665 x = -5.811865258 + -0.6666666665 Combine like terms: -5.811865258 + -0.6666666665 = -6.4785319245 x = -6.4785319245 Simplifying x = -6.4785319245

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.1451985915, -6.4785319245}

Solution

x = {0, 5.1451985915, -6.4785319245}

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