(2x^3-3x^2+x)-(2x^3+8x^2-1)=

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Solution for (2x^3-3x^2+x)-(2x^3+8x^2-1)= equation:


Simplifying
(2x3 + -3x2 + x) + -1(2x3 + 8x2 + -1) = 0

Reorder the terms:
(x + -3x2 + 2x3) + -1(2x3 + 8x2 + -1) = 0

Remove parenthesis around (x + -3x2 + 2x3)
x + -3x2 + 2x3 + -1(2x3 + 8x2 + -1) = 0

Reorder the terms:
x + -3x2 + 2x3 + -1(-1 + 8x2 + 2x3) = 0
x + -3x2 + 2x3 + (-1 * -1 + 8x2 * -1 + 2x3 * -1) = 0
x + -3x2 + 2x3 + (1 + -8x2 + -2x3) = 0

Reorder the terms:
1 + x + -3x2 + -8x2 + 2x3 + -2x3 = 0

Combine like terms: -3x2 + -8x2 = -11x2
1 + x + -11x2 + 2x3 + -2x3 = 0

Combine like terms: 2x3 + -2x3 = 0
1 + x + -11x2 + 0 = 0
1 + x + -11x2 = 0

Solving
1 + x + -11x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-11 the coefficient of the squared term: 

Divide each side by '-11'.
-0.09090909091 + -0.09090909091x + x2 = 0

Move the constant term to the right:

Add '0.09090909091' to each side of the equation.
-0.09090909091 + -0.09090909091x + 0.09090909091 + x2 = 0 + 0.09090909091

Reorder the terms:
-0.09090909091 + 0.09090909091 + -0.09090909091x + x2 = 0 + 0.09090909091

Combine like terms: -0.09090909091 + 0.09090909091 = 0.00000000000
0.00000000000 + -0.09090909091x + x2 = 0 + 0.09090909091
-0.09090909091x + x2 = 0 + 0.09090909091

Combine like terms: 0 + 0.09090909091 = 0.09090909091
-0.09090909091x + x2 = 0.09090909091

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-0.09090909091x + 0.25 + x2 = 0.09090909091 + 0.25

Reorder the terms:
0.25 + -0.09090909091x + x2 = 0.09090909091 + 0.25

Combine like terms: 0.09090909091 + 0.25 = 0.34090909091
0.25 + -0.09090909091x + x2 = 0.34090909091

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 0.34090909091

Calculate the square root of the right side: 0.583874208

Break this problem into two subproblems by setting 
(x + 0.5) equal to 0.583874208 and -0.583874208.

Subproblem 1

x + 0.5 = 0.583874208 Simplifying x + 0.5 = 0.583874208 Reorder the terms: 0.5 + x = 0.583874208 Solving 0.5 + x = 0.583874208 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 0.583874208 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 0.583874208 + -0.5 x = 0.583874208 + -0.5 Combine like terms: 0.583874208 + -0.5 = 0.083874208 x = 0.083874208 Simplifying x = 0.083874208

Subproblem 2

x + 0.5 = -0.583874208 Simplifying x + 0.5 = -0.583874208 Reorder the terms: 0.5 + x = -0.583874208 Solving 0.5 + x = -0.583874208 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -0.583874208 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -0.583874208 + -0.5 x = -0.583874208 + -0.5 Combine like terms: -0.583874208 + -0.5 = -1.083874208 x = -1.083874208 Simplifying x = -1.083874208

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.083874208, -1.083874208}

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