3x^3+120x^2=-1200x

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Solution for 3x^3+120x^2=-1200x equation:


Simplifying
3x3 + 120x2 = -1200x

Reorder the terms:
120x2 + 3x3 = -1200x

Solving
120x2 + 3x3 = -1200x

Solving for variable 'x'.

Reorder the terms:
1200x + 120x2 + 3x3 = -1200x + 1200x

Combine like terms: -1200x + 1200x = 0
1200x + 120x2 + 3x3 = 0

Factor out the Greatest Common Factor (GCF), '3x'.
3x(400 + 40x + x2) = 0

Factor a trinomial.
3x((20 + x)(20 + x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0

Subproblem 2

Set the factor '(20 + x)' equal to zero and attempt to solve: Simplifying 20 + x = 0 Solving 20 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + x = 0 + -20 Combine like terms: 20 + -20 = 0 0 + x = 0 + -20 x = 0 + -20 Combine like terms: 0 + -20 = -20 x = -20 Simplifying x = -20

Subproblem 3

Set the factor '(20 + x)' equal to zero and attempt to solve: Simplifying 20 + x = 0 Solving 20 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + x = 0 + -20 Combine like terms: 20 + -20 = 0 0 + x = 0 + -20 x = 0 + -20 Combine like terms: 0 + -20 = -20 x = -20 Simplifying x = -20

Solution

x = {0, -20, -20}

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