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

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


Simplifying
0 = -1x4 + -4x3 + -4x2

Reorder the terms:
0 = -4x2 + -4x3 + -1x4

Solving
0 = -4x2 + -4x3 + -1x4

Solving for variable 'x'.
Remove the zero:
4x2 + 4x3 + x4 = -4x2 + -4x3 + -1x4 + 4x2 + 4x3 + x4

Reorder the terms:
4x2 + 4x3 + x4 = -4x2 + 4x2 + -4x3 + 4x3 + -1x4 + x4

Combine like terms: -4x2 + 4x2 = 0
4x2 + 4x3 + x4 = 0 + -4x3 + 4x3 + -1x4 + x4
4x2 + 4x3 + x4 = -4x3 + 4x3 + -1x4 + x4

Combine like terms: -4x3 + 4x3 = 0
4x2 + 4x3 + x4 = 0 + -1x4 + x4
4x2 + 4x3 + x4 = -1x4 + x4

Combine like terms: -1x4 + x4 = 0
4x2 + 4x3 + x4 = 0

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

Factor a trinomial.
x2((2 + x)(2 + x)) = 0

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 '(2 + x)' equal to zero and attempt to solve: Simplifying 2 + x = 0 Solving 2 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0 + -2 x = 0 + -2 Combine like terms: 0 + -2 = -2 x = -2 Simplifying x = -2

Subproblem 3

Set the factor '(2 + x)' equal to zero and attempt to solve: Simplifying 2 + x = 0 Solving 2 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0 + -2 x = 0 + -2 Combine like terms: 0 + -2 = -2 x = -2 Simplifying x = -2

Solution

x = {0, -2, -2}

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