(x)=2x^3+x^2-11x

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Solution for (x)=2x^3+x^2-11x equation:


Simplifying
(x) = 2x3 + x2 + -11x
x = 2x3 + x2 + -11x

Reorder the terms:
x = -11x + x2 + 2x3

Solving
x = -11x + x2 + 2x3

Solving for variable 'x'.

Combine like terms: x + 11x = 12x
12x + -1x2 + -2x3 = -11x + x2 + 2x3 + 11x + -1x2 + -2x3

Reorder the terms:
12x + -1x2 + -2x3 = -11x + 11x + x2 + -1x2 + 2x3 + -2x3

Combine like terms: -11x + 11x = 0
12x + -1x2 + -2x3 = 0 + x2 + -1x2 + 2x3 + -2x3
12x + -1x2 + -2x3 = x2 + -1x2 + 2x3 + -2x3

Combine like terms: x2 + -1x2 = 0
12x + -1x2 + -2x3 = 0 + 2x3 + -2x3
12x + -1x2 + -2x3 = 2x3 + -2x3

Combine like terms: 2x3 + -2x3 = 0
12x + -1x2 + -2x3 = 0

Factor out the Greatest Common Factor (GCF), 'x'.
x(12 + -1x + -2x2) = 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 '(12 + -1x + -2x2)' equal to zero and attempt to solve: Simplifying 12 + -1x + -2x2 = 0 Solving 12 + -1x + -2x2 = 0 Begin completing the square. Divide all terms by -2 the coefficient of the squared term: Divide each side by '-2'. -6 + 0.5x + x2 = 0 Move the constant term to the right: Add '6' to each side of the equation. -6 + 0.5x + 6 + x2 = 0 + 6 Reorder the terms: -6 + 6 + 0.5x + x2 = 0 + 6 Combine like terms: -6 + 6 = 0 0 + 0.5x + x2 = 0 + 6 0.5x + x2 = 0 + 6 Combine like terms: 0 + 6 = 6 0.5x + x2 = 6 The x term is 0.5x. Take half its coefficient (0.25). Square it (0.0625) and add it to both sides. Add '0.0625' to each side of the equation. 0.5x + 0.0625 + x2 = 6 + 0.0625 Reorder the terms: 0.0625 + 0.5x + x2 = 6 + 0.0625 Combine like terms: 6 + 0.0625 = 6.0625 0.0625 + 0.5x + x2 = 6.0625 Factor a perfect square on the left side: (x + 0.25)(x + 0.25) = 6.0625 Calculate the square root of the right side: 2.46221445 Break this problem into two subproblems by setting (x + 0.25) equal to 2.46221445 and -2.46221445.

Subproblem 1

x + 0.25 = 2.46221445 Simplifying x + 0.25 = 2.46221445 Reorder the terms: 0.25 + x = 2.46221445 Solving 0.25 + x = 2.46221445 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = 2.46221445 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = 2.46221445 + -0.25 x = 2.46221445 + -0.25 Combine like terms: 2.46221445 + -0.25 = 2.21221445 x = 2.21221445 Simplifying x = 2.21221445

Subproblem 2

x + 0.25 = -2.46221445 Simplifying x + 0.25 = -2.46221445 Reorder the terms: 0.25 + x = -2.46221445 Solving 0.25 + x = -2.46221445 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = -2.46221445 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = -2.46221445 + -0.25 x = -2.46221445 + -0.25 Combine like terms: -2.46221445 + -0.25 = -2.71221445 x = -2.71221445 Simplifying x = -2.71221445

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.21221445, -2.71221445}

Solution

x = {0, 2.21221445, -2.71221445}

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