3x^3=27x^2+66x-3x^3

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Solution for 3x^3=27x^2+66x-3x^3 equation:


Simplifying
3x3 = 27x2 + 66x + -3x3

Reorder the terms:
3x3 = 66x + 27x2 + -3x3

Solving
3x3 = 66x + 27x2 + -3x3

Solving for variable 'x'.

Reorder the terms:
-66x + -27x2 + 3x3 + 3x3 = 66x + 27x2 + -3x3 + -66x + -27x2 + 3x3

Combine like terms: 3x3 + 3x3 = 6x3
-66x + -27x2 + 6x3 = 66x + 27x2 + -3x3 + -66x + -27x2 + 3x3

Reorder the terms:
-66x + -27x2 + 6x3 = 66x + -66x + 27x2 + -27x2 + -3x3 + 3x3

Combine like terms: 66x + -66x = 0
-66x + -27x2 + 6x3 = 0 + 27x2 + -27x2 + -3x3 + 3x3
-66x + -27x2 + 6x3 = 27x2 + -27x2 + -3x3 + 3x3

Combine like terms: 27x2 + -27x2 = 0
-66x + -27x2 + 6x3 = 0 + -3x3 + 3x3
-66x + -27x2 + 6x3 = -3x3 + 3x3

Combine like terms: -3x3 + 3x3 = 0
-66x + -27x2 + 6x3 = 0

Factor out the Greatest Common Factor (GCF), '3x'.
3x(-22 + -9x + 2x2) = 0

Ignore the factor 3.

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 '(-22 + -9x + 2x2)' equal to zero and attempt to solve: Simplifying -22 + -9x + 2x2 = 0 Solving -22 + -9x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -11 + -4.5x + x2 = 0 Move the constant term to the right: Add '11' to each side of the equation. -11 + -4.5x + 11 + x2 = 0 + 11 Reorder the terms: -11 + 11 + -4.5x + x2 = 0 + 11 Combine like terms: -11 + 11 = 0 0 + -4.5x + x2 = 0 + 11 -4.5x + x2 = 0 + 11 Combine like terms: 0 + 11 = 11 -4.5x + x2 = 11 The x term is -4.5x. Take half its coefficient (-2.25). Square it (5.0625) and add it to both sides. Add '5.0625' to each side of the equation. -4.5x + 5.0625 + x2 = 11 + 5.0625 Reorder the terms: 5.0625 + -4.5x + x2 = 11 + 5.0625 Combine like terms: 11 + 5.0625 = 16.0625 5.0625 + -4.5x + x2 = 16.0625 Factor a perfect square on the left side: (x + -2.25)(x + -2.25) = 16.0625 Calculate the square root of the right side: 4.007804885 Break this problem into two subproblems by setting (x + -2.25) equal to 4.007804885 and -4.007804885.

Subproblem 1

x + -2.25 = 4.007804885 Simplifying x + -2.25 = 4.007804885 Reorder the terms: -2.25 + x = 4.007804885 Solving -2.25 + x = 4.007804885 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + x = 4.007804885 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + x = 4.007804885 + 2.25 x = 4.007804885 + 2.25 Combine like terms: 4.007804885 + 2.25 = 6.257804885 x = 6.257804885 Simplifying x = 6.257804885

Subproblem 2

x + -2.25 = -4.007804885 Simplifying x + -2.25 = -4.007804885 Reorder the terms: -2.25 + x = -4.007804885 Solving -2.25 + x = -4.007804885 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + x = -4.007804885 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + x = -4.007804885 + 2.25 x = -4.007804885 + 2.25 Combine like terms: -4.007804885 + 2.25 = -1.757804885 x = -1.757804885 Simplifying x = -1.757804885

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.257804885, -1.757804885}

Solution

x = {0, 6.257804885, -1.757804885}

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