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

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

Simplifying
3x3 + -21x2 = -18x

Reorder the terms:
-21x2 + 3x3 = -18x

Solving
-21x2 + 3x3 = -18x

Solving for variable 'x'.

Reorder the terms:
18x + -21x2 + 3x3 = -18x + 18x

Combine like terms: -18x + 18x = 0
18x + -21x2 + 3x3 = 0

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

Factor a trinomial.
3x((1 + -1x)(6 + -1x)) = 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 '(1 + -1x)' equal to zero and attempt to solve:

Simplifying
1 + -1x = 0

Solving
1 + -1x = 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 + -1x = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -1x = 0 + -1
-1x = 0 + -1

Combine like terms: 0 + -1 = -1
-1x = -1

Divide each side by '-1'.
x = 1

Simplifying
x = 1
Subproblem 3
Set the factor '(6 + -1x)' equal to zero and attempt to solve:

Simplifying
6 + -1x = 0

Solving
6 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-6' to each side of the equation.
6 + -6 + -1x = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -1x = 0 + -6
-1x = 0 + -6

Combine like terms: 0 + -6 = -6
-1x = -6

Divide each side by '-1'.
x = 6

Simplifying
x = 6
Solution
x = {0, 1, 6}