4x^3-x=x-8x^2

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Solution for 4x^3-x=x-8x^2 equation:


Simplifying
4x3 + -1x = x + -8x2

Reorder the terms:
-1x + 4x3 = x + -8x2

Solving
-1x + 4x3 = x + -8x2

Solving for variable 'x'.

Reorder the terms:
-1x + -1x + 8x2 + 4x3 = x + -8x2 + -1x + 8x2

Combine like terms: -1x + -1x = -2x
-2x + 8x2 + 4x3 = x + -8x2 + -1x + 8x2

Reorder the terms:
-2x + 8x2 + 4x3 = x + -1x + -8x2 + 8x2

Combine like terms: x + -1x = 0
-2x + 8x2 + 4x3 = 0 + -8x2 + 8x2
-2x + 8x2 + 4x3 = -8x2 + 8x2

Combine like terms: -8x2 + 8x2 = 0
-2x + 8x2 + 4x3 = 0

Factor out the Greatest Common Factor (GCF), '2x'.
2x(-1 + 4x + 2x2) = 0

Ignore the factor 2.

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 '(-1 + 4x + 2x2)' equal to zero and attempt to solve: Simplifying -1 + 4x + 2x2 = 0 Solving -1 + 4x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -0.5 + 2x + x2 = 0 Move the constant term to the right: Add '0.5' to each side of the equation. -0.5 + 2x + 0.5 + x2 = 0 + 0.5 Reorder the terms: -0.5 + 0.5 + 2x + x2 = 0 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + 2x + x2 = 0 + 0.5 2x + x2 = 0 + 0.5 Combine like terms: 0 + 0.5 = 0.5 2x + x2 = 0.5 The x term is 2x. Take half its coefficient (1). Square it (1) and add it to both sides. Add '1' to each side of the equation. 2x + 1 + x2 = 0.5 + 1 Reorder the terms: 1 + 2x + x2 = 0.5 + 1 Combine like terms: 0.5 + 1 = 1.5 1 + 2x + x2 = 1.5 Factor a perfect square on the left side: (x + 1)(x + 1) = 1.5 Calculate the square root of the right side: 1.224744871 Break this problem into two subproblems by setting (x + 1) equal to 1.224744871 and -1.224744871.

Subproblem 1

x + 1 = 1.224744871 Simplifying x + 1 = 1.224744871 Reorder the terms: 1 + x = 1.224744871 Solving 1 + x = 1.224744871 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 1.224744871 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.224744871 + -1 x = 1.224744871 + -1 Combine like terms: 1.224744871 + -1 = 0.224744871 x = 0.224744871 Simplifying x = 0.224744871

Subproblem 2

x + 1 = -1.224744871 Simplifying x + 1 = -1.224744871 Reorder the terms: 1 + x = -1.224744871 Solving 1 + x = -1.224744871 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -1.224744871 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.224744871 + -1 x = -1.224744871 + -1 Combine like terms: -1.224744871 + -1 = -2.224744871 x = -2.224744871 Simplifying x = -2.224744871

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.224744871, -2.224744871}

Solution

x = {0, 0.224744871, -2.224744871}

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