x^5+7x^4=18x^3

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Solution for x^5+7x^4=18x^3 equation:


Simplifying
x5 + 7x4 = 18x3

Reorder the terms:
7x4 + x5 = 18x3

Solving
7x4 + x5 = 18x3

Solving for variable 'x'.

Reorder the terms:
-18x3 + 7x4 + x5 = 18x3 + -18x3

Combine like terms: 18x3 + -18x3 = 0
-18x3 + 7x4 + x5 = 0

Factor out the Greatest Common Factor (GCF), 'x3'.
x3(-18 + 7x + x2) = 0

Factor a trinomial.
x3((-9 + -1x)(2 + -1x)) = 0

Subproblem 1

Set the factor 'x3' equal to zero and attempt to solve: Simplifying x3 = 0 Solving x3 = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x3 = 0 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 2

Set the factor '(-9 + -1x)' equal to zero and attempt to solve: Simplifying -9 + -1x = 0 Solving -9 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -1x = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -1x = 0 + 9 -1x = 0 + 9 Combine like terms: 0 + 9 = 9 -1x = 9 Divide each side by '-1'. x = -9 Simplifying x = -9

Subproblem 3

Set the factor '(2 + -1x)' equal to zero and attempt to solve: Simplifying 2 + -1x = 0 Solving 2 + -1x = 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 + -1x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x = 0 + -2 -1x = 0 + -2 Combine like terms: 0 + -2 = -2 -1x = -2 Divide each side by '-1'. x = 2 Simplifying x = 2

Solution

x = {-9, 2}

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