2x^3+40x=18x^2

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Solution for 2x^3+40x=18x^2 equation:


Simplifying
2x3 + 40x = 18x2

Reorder the terms:
40x + 2x3 = 18x2

Solving
40x + 2x3 = 18x2

Solving for variable 'x'.

Reorder the terms:
40x + -18x2 + 2x3 = 18x2 + -18x2

Combine like terms: 18x2 + -18x2 = 0
40x + -18x2 + 2x3 = 0

Factor out the Greatest Common Factor (GCF), '2x'.
2x(20 + -9x + x2) = 0

Factor a trinomial.
2x((4 + -1x)(5 + -1x)) = 0

Ignore the factor 2.

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 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 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 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4

Subproblem 3

Set the factor '(5 + -1x)' equal to zero and attempt to solve: Simplifying 5 + -1x = 0 Solving 5 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1x = 0 + -5 -1x = 0 + -5 Combine like terms: 0 + -5 = -5 -1x = -5 Divide each side by '-1'. x = 5 Simplifying x = 5

Solution

x = {0, 4, 5}

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