9x^3+8x=-18x^2

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Solution for 9x^3+8x=-18x^2 equation:


Simplifying
9x3 + 8x = -18x2

Reorder the terms:
8x + 9x3 = -18x2

Solving
8x + 9x3 = -18x2

Solving for variable 'x'.

Reorder the terms:
8x + 18x2 + 9x3 = -18x2 + 18x2

Combine like terms: -18x2 + 18x2 = 0
8x + 18x2 + 9x3 = 0

Factor out the Greatest Common Factor (GCF), 'x'.
x(8 + 18x + 9x2) = 0

Factor a trinomial.
x((4 + 3x)(2 + 3x)) = 0

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 '(4 + 3x)' equal to zero and attempt to solve: Simplifying 4 + 3x = 0 Solving 4 + 3x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 3x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 3x = 0 + -4 3x = 0 + -4 Combine like terms: 0 + -4 = -4 3x = -4 Divide each side by '3'. x = -1.333333333 Simplifying x = -1.333333333

Subproblem 3

Set the factor '(2 + 3x)' equal to zero and attempt to solve: Simplifying 2 + 3x = 0 Solving 2 + 3x = 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 + 3x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 3x = 0 + -2 3x = 0 + -2 Combine like terms: 0 + -2 = -2 3x = -2 Divide each side by '3'. x = -0.6666666667 Simplifying x = -0.6666666667

Solution

x = {0, -1.333333333, -0.6666666667}

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