0=x^3+4x^2-4x

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Solution for 0=x^3+4x^2-4x equation:


Simplifying
0 = x3 + 4x2 + -4x

Reorder the terms:
0 = -4x + 4x2 + x3

Solving
0 = -4x + 4x2 + x3

Solving for variable 'x'.
Remove the zero:
4x + -4x2 + -1x3 = -4x + 4x2 + x3 + 4x + -4x2 + -1x3

Reorder the terms:
4x + -4x2 + -1x3 = -4x + 4x + 4x2 + -4x2 + x3 + -1x3

Combine like terms: -4x + 4x = 0
4x + -4x2 + -1x3 = 0 + 4x2 + -4x2 + x3 + -1x3
4x + -4x2 + -1x3 = 4x2 + -4x2 + x3 + -1x3

Combine like terms: 4x2 + -4x2 = 0
4x + -4x2 + -1x3 = 0 + x3 + -1x3
4x + -4x2 + -1x3 = x3 + -1x3

Combine like terms: x3 + -1x3 = 0
4x + -4x2 + -1x3 = 0

Factor out the Greatest Common Factor (GCF), 'x'.
x(4 + -4x + -1x2) = 0

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 '(4 + -4x + -1x2)' equal to zero and attempt to solve: Simplifying 4 + -4x + -1x2 = 0 Solving 4 + -4x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. -4 + 4x + x2 = 0 Move the constant term to the right: Add '4' to each side of the equation. -4 + 4x + 4 + x2 = 0 + 4 Reorder the terms: -4 + 4 + 4x + x2 = 0 + 4 Combine like terms: -4 + 4 = 0 0 + 4x + x2 = 0 + 4 4x + x2 = 0 + 4 Combine like terms: 0 + 4 = 4 4x + x2 = 4 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 = 4 + 4 Reorder the terms: 4 + 4x + x2 = 4 + 4 Combine like terms: 4 + 4 = 8 4 + 4x + x2 = 8 Factor a perfect square on the left side: (x + 2)(x + 2) = 8 Calculate the square root of the right side: 2.828427125 Break this problem into two subproblems by setting (x + 2) equal to 2.828427125 and -2.828427125.

Subproblem 1

x + 2 = 2.828427125 Simplifying x + 2 = 2.828427125 Reorder the terms: 2 + x = 2.828427125 Solving 2 + x = 2.828427125 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 = 2.828427125 + -2 Combine like terms: 2 + -2 = 0 0 + x = 2.828427125 + -2 x = 2.828427125 + -2 Combine like terms: 2.828427125 + -2 = 0.828427125 x = 0.828427125 Simplifying x = 0.828427125

Subproblem 2

x + 2 = -2.828427125 Simplifying x + 2 = -2.828427125 Reorder the terms: 2 + x = -2.828427125 Solving 2 + x = -2.828427125 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 = -2.828427125 + -2 Combine like terms: 2 + -2 = 0 0 + x = -2.828427125 + -2 x = -2.828427125 + -2 Combine like terms: -2.828427125 + -2 = -4.828427125 x = -4.828427125 Simplifying x = -4.828427125

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.828427125, -4.828427125}

Solution

x = {0, 0.828427125, -4.828427125}

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