x^4+2x^3+8x^2=0

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Solution for x^4+2x^3+8x^2=0 equation:


Simplifying
x4 + 2x3 + 8x2 = 0

Reorder the terms:
8x2 + 2x3 + x4 = 0

Solving
8x2 + 2x3 + x4 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), 'x2'.
x2(8 + 2x + x2) = 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 '(8 + 2x + x2)' equal to zero and attempt to solve: Simplifying 8 + 2x + x2 = 0 Solving 8 + 2x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-8' to each side of the equation. 8 + 2x + -8 + x2 = 0 + -8 Reorder the terms: 8 + -8 + 2x + x2 = 0 + -8 Combine like terms: 8 + -8 = 0 0 + 2x + x2 = 0 + -8 2x + x2 = 0 + -8 Combine like terms: 0 + -8 = -8 2x + x2 = -8 The x term is 2x. Take half its coefficient (1). Square it (1) and add it to both sides. Add '1' to each side of the equation. 2x + 1 + x2 = -8 + 1 Reorder the terms: 1 + 2x + x2 = -8 + 1 Combine like terms: -8 + 1 = -7 1 + 2x + x2 = -7 Factor a perfect square on the left side: (x + 1)(x + 1) = -7 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}

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