21x^2-18x^3=6x

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Solution for 21x^2-18x^3=6x equation:


Simplifying
21x2 + -18x3 = 6x

Solving
21x2 + -18x3 = 6x

Solving for variable 'x'.

Reorder the terms:
-6x + 21x2 + -18x3 = 6x + -6x

Combine like terms: 6x + -6x = 0
-6x + 21x2 + -18x3 = 0

Factor out the Greatest Common Factor (GCF), '3x'.
3x(-2 + 7x + -6x2) = 0

Factor a trinomial.
3x((-2 + 3x)(1 + -2x)) = 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 '(-2 + 3x)' equal to zero and attempt to solve: Simplifying -2 + 3x = 0 Solving -2 + 3x = 0 Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + 3x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + 3x = 0 + 2 3x = 0 + 2 Combine like terms: 0 + 2 = 2 3x = 2 Divide each side by '3'. x = 0.6666666667 Simplifying x = 0.6666666667

Subproblem 3

Set the factor '(1 + -2x)' equal to zero and attempt to solve: Simplifying 1 + -2x = 0 Solving 1 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -2x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -2x = 0 + -1 -2x = 0 + -1 Combine like terms: 0 + -1 = -1 -2x = -1 Divide each side by '-2'. x = 0.5 Simplifying x = 0.5

Solution

x = {0, 0.6666666667, 0.5}

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