0=-4x^4-4x^3-4x^2

Solution for 0=-4x^4-4x^3-4x^2 equation:

Simplifying
0 = -4x4 + -4x3 + -4x2

Reorder the terms:
0 = -4x2 + -4x3 + -4x4

Solving
0 = -4x2 + -4x3 + -4x4

Solving for variable 'x'.
Remove the zero:
4x2 + 4x3 + 4x4 = -4x2 + -4x3 + -4x4 + 4x2 + 4x3 + 4x4

Reorder the terms:
4x2 + 4x3 + 4x4 = -4x2 + 4x2 + -4x3 + 4x3 + -4x4 + 4x4

Combine like terms: -4x2 + 4x2 = 0
4x2 + 4x3 + 4x4 = 0 + -4x3 + 4x3 + -4x4 + 4x4
4x2 + 4x3 + 4x4 = -4x3 + 4x3 + -4x4 + 4x4

Combine like terms: -4x3 + 4x3 = 0
4x2 + 4x3 + 4x4 = 0 + -4x4 + 4x4
4x2 + 4x3 + 4x4 = -4x4 + 4x4

Combine like terms: -4x4 + 4x4 = 0
4x2 + 4x3 + 4x4 = 0

Factor out the Greatest Common Factor (GCF), '4x2'.
4x2(1 + x + x2) = 0

Ignore the factor 4.
Subproblem 1
Set the factor 'x2' equal to zero and attempt to solve:

Simplifying
x2 = 0

Solving
x2 = 0

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

Simplifying
x2 = 0

Take the square root of each side:
x = {0}
Subproblem 2
Set the factor '(1 + x + x2)' equal to zero and attempt to solve:

Simplifying
1 + x + x2 = 0

Solving
1 + x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + x + -1 + x2 = 0 + -1

Reorder the terms:
1 + -1 + x + x2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + x + x2 = 0 + -1
x + x2 = 0 + -1

Combine like terms: 0 + -1 = -1
x + x2 = -1

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
x + 0.25 + x2 = -1 + 0.25

Reorder the terms:
0.25 + x + x2 = -1 + 0.25

Combine like terms: -1 + 0.25 = -0.75
0.25 + x + x2 = -0.75

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = -0.75

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
x = {0}