6b^4-39b^2-135=0

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Solution for 6b^4-39b^2-135=0 equation:


Simplifying
6b4 + -39b2 + -135 = 0

Reorder the terms:
-135 + -39b2 + 6b4 = 0

Solving
-135 + -39b2 + 6b4 = 0

Solving for variable 'b'.

Factor out the Greatest Common Factor (GCF), '3'.
3(-45 + -13b2 + 2b4) = 0

Factor a trinomial.
3((-5 + -2b2)(9 + -1b2)) = 0

Factor a difference between two squares.
3((-5 + -2b2)((3 + b)(3 + -1b))) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-5 + -2b2)' equal to zero and attempt to solve: Simplifying -5 + -2b2 = 0 Solving -5 + -2b2 = 0 Move all terms containing b to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -2b2 = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -2b2 = 0 + 5 -2b2 = 0 + 5 Combine like terms: 0 + 5 = 5 -2b2 = 5 Divide each side by '-2'. b2 = -2.5 Simplifying b2 = -2.5 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 '(3 + b)' equal to zero and attempt to solve: Simplifying 3 + b = 0 Solving 3 + b = 0 Move all terms containing b to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + b = 0 + -3 Combine like terms: 3 + -3 = 0 0 + b = 0 + -3 b = 0 + -3 Combine like terms: 0 + -3 = -3 b = -3 Simplifying b = -3

Subproblem 3

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

Solution

b = {-3, 3}

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