x^3+8x^2-x-2x=0

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Solution for x^3+8x^2-x-2x=0 equation:


Simplifying
x3 + 8x2 + -1x + -2x = 0

Reorder the terms:
-1x + -2x + 8x2 + x3 = 0

Combine like terms: -1x + -2x = -3x
-3x + 8x2 + x3 = 0

Solving
-3x + 8x2 + x3 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), 'x'.
x(-3 + 8x + x2) = 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 '(-3 + 8x + x2)' equal to zero and attempt to solve: Simplifying -3 + 8x + x2 = 0 Solving -3 + 8x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '3' to each side of the equation. -3 + 8x + 3 + x2 = 0 + 3 Reorder the terms: -3 + 3 + 8x + x2 = 0 + 3 Combine like terms: -3 + 3 = 0 0 + 8x + x2 = 0 + 3 8x + x2 = 0 + 3 Combine like terms: 0 + 3 = 3 8x + x2 = 3 The x term is 8x. Take half its coefficient (4). Square it (16) and add it to both sides. Add '16' to each side of the equation. 8x + 16 + x2 = 3 + 16 Reorder the terms: 16 + 8x + x2 = 3 + 16 Combine like terms: 3 + 16 = 19 16 + 8x + x2 = 19 Factor a perfect square on the left side: (x + 4)(x + 4) = 19 Calculate the square root of the right side: 4.358898944 Break this problem into two subproblems by setting (x + 4) equal to 4.358898944 and -4.358898944.

Subproblem 1

x + 4 = 4.358898944 Simplifying x + 4 = 4.358898944 Reorder the terms: 4 + x = 4.358898944 Solving 4 + x = 4.358898944 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 4.358898944 + -4 Combine like terms: 4 + -4 = 0 0 + x = 4.358898944 + -4 x = 4.358898944 + -4 Combine like terms: 4.358898944 + -4 = 0.358898944 x = 0.358898944 Simplifying x = 0.358898944

Subproblem 2

x + 4 = -4.358898944 Simplifying x + 4 = -4.358898944 Reorder the terms: 4 + x = -4.358898944 Solving 4 + x = -4.358898944 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = -4.358898944 + -4 Combine like terms: 4 + -4 = 0 0 + x = -4.358898944 + -4 x = -4.358898944 + -4 Combine like terms: -4.358898944 + -4 = -8.358898944 x = -8.358898944 Simplifying x = -8.358898944

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.358898944, -8.358898944}

Solution

x = {0, 0.358898944, -8.358898944}

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