7y^3-20y^2-3y=0

Solution for 7y^3-20y^2-3y=0 equation:

Simplifying
7y3 + -20y2 + -3y = 0

Reorder the terms:
-3y + -20y2 + 7y3 = 0

Solving
-3y + -20y2 + 7y3 = 0

Solving for variable 'y'.

Factor out the Greatest Common Factor (GCF), 'y'.
y(-3 + -20y + 7y2) = 0

Factor a trinomial.
y((-1 + -7y)(3 + -1y)) = 0

Subproblem 1
Set the factor 'y' equal to zero and attempt to solve:

Simplifying
y = 0

Solving
y = 0

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

Simplifying
y = 0
Subproblem 2
Set the factor '(-1 + -7y)' equal to zero and attempt to solve:

Simplifying
-1 + -7y = 0

Solving
-1 + -7y = 0

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

Add '1' to each side of the equation.
-1 + 1 + -7y = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -7y = 0 + 1
-7y = 0 + 1

Combine like terms: 0 + 1 = 1
-7y = 1

Divide each side by '-7'.
y = -0.1428571429

Simplifying
y = -0.1428571429
Subproblem 3
Set the factor '(3 + -1y)' equal to zero and attempt to solve:

Simplifying
3 + -1y = 0

Solving
3 + -1y = 0

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

Add '-3' to each side of the equation.
3 + -3 + -1y = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -1y = 0 + -3
-1y = 0 + -3

Combine like terms: 0 + -3 = -3
-1y = -3

Divide each side by '-1'.
y = 3

Simplifying
y = 3
Solution
y = {0, -0.1428571429, 3}