x^4+3x^3=18x^2

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Solution for x^4+3x^3=18x^2 equation:


Simplifying
x4 + 3x3 = 18x2

Reorder the terms:
3x3 + x4 = 18x2

Solving
3x3 + x4 = 18x2

Solving for variable 'x'.

Reorder the terms:
-18x2 + 3x3 + x4 = 18x2 + -18x2

Combine like terms: 18x2 + -18x2 = 0
-18x2 + 3x3 + x4 = 0

Factor out the Greatest Common Factor (GCF), 'x2'.
x2(-18 + 3x + x2) = 0

Factor a trinomial.
x2((-6 + -1x)(3 + -1x)) = 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 '(-6 + -1x)' equal to zero and attempt to solve: Simplifying -6 + -1x = 0 Solving -6 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + -1x = 0 + 6 Combine like terms: -6 + 6 = 0 0 + -1x = 0 + 6 -1x = 0 + 6 Combine like terms: 0 + 6 = 6 -1x = 6 Divide each side by '-1'. x = -6 Simplifying x = -6

Subproblem 3

Set the factor '(3 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3

Solution

x = {0, -6, 3}

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