14c^3-21c=

Solution for 14c^3-21c= equation:

Simplifying
14c3 + -21c = 0

Reorder the terms:
-21c + 14c3 = 0

Solving
-21c + 14c3 = 0

Solving for variable 'c'.

Factor out the Greatest Common Factor (GCF), '7c'.
7c(-3 + 2c2) = 0

Ignore the factor 7.
Subproblem 1
Set the factor 'c' equal to zero and attempt to solve:

Simplifying
c = 0

Solving
c = 0

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

Simplifying
c = 0
Subproblem 2
Set the factor '(-3 + 2c2)' equal to zero and attempt to solve:

Simplifying
-3 + 2c2 = 0

Solving
-3 + 2c2 = 0

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

Add '3' to each side of the equation.
-3 + 3 + 2c2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 2c2 = 0 + 3
2c2 = 0 + 3

Combine like terms: 0 + 3 = 3
2c2 = 3

Divide each side by '2'.
c2 = 1.5

Simplifying
c2 = 1.5

Take the square root of each side:
c = {-1.224744871, 1.224744871}
Solution
c = {0, -1.224744871, 1.224744871}