g^4-18g^2+81=0

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Solution for g^4-18g^2+81=0 equation:


Simplifying
g4 + -18g2 + 81 = 0

Reorder the terms:
81 + -18g2 + g4 = 0

Solving
81 + -18g2 + g4 = 0

Solving for variable 'g'.

Factor a trinomial.
(9 + -1g2)(9 + -1g2) = 0

Factor a difference between two squares.
((3 + g)(3 + -1g))(9 + -1g2) = 0

Factor a difference between two squares.
((3 + g)(3 + -1g))(3 + g)(3 + -1g) = 0

Subproblem 1

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

Subproblem 2

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

Subproblem 3

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

Subproblem 4

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

Solution

g = {-3, 3, -3, 3}

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