n^4+2n^3+3n^2=0

Solution for n^4+2n^3+3n^2=0 equation:

Simplifying
n4 + 2n3 + 3n2 = 0

Reorder the terms:
3n2 + 2n3 + n4 = 0

Solving
3n2 + 2n3 + n4 = 0

Solving for variable 'n'.

Factor out the Greatest Common Factor (GCF), 'n2'.
n2(3 + 2n + n2) = 0

Subproblem 1
Set the factor 'n2' equal to zero and attempt to solve:

Simplifying
n2 = 0

Solving
n2 = 0

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

Simplifying
n2 = 0

Take the square root of each side:
n = {0}
Subproblem 2
Set the factor '(3 + 2n + n2)' equal to zero and attempt to solve:

Simplifying
3 + 2n + n2 = 0

Solving
3 + 2n + n2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + 2n + -3 + n2 = 0 + -3

Reorder the terms:
3 + -3 + 2n + n2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 2n + n2 = 0 + -3
2n + n2 = 0 + -3

Combine like terms: 0 + -3 = -3
2n + n2 = -3

The n term is 2n.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2n + 1 + n2 = -3 + 1

Reorder the terms:
1 + 2n + n2 = -3 + 1

Combine like terms: -3 + 1 = -2
1 + 2n + n2 = -2

Factor a perfect square on the left side:
(n + 1)(n + 1) = -2

Can't calculate square root of the right side.

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.
Solution
n = {0}