5a^4+6a^2-27=0

Solution for 5a^4+6a^2-27=0 equation:

Simplifying
5a4 + 6a2 + -27 = 0

Reorder the terms:
-27 + 6a2 + 5a4 = 0

Solving
-27 + 6a2 + 5a4 = 0

Solving for variable 'a'.

Factor a trinomial.
(-3 + -1a2)(9 + -5a2) = 0

Subproblem 1
Set the factor '(-3 + -1a2)' equal to zero and attempt to solve:

Simplifying
-3 + -1a2 = 0

Solving
-3 + -1a2 = 0

Move all terms containing a to the left, all other terms to the right.

Add '3' to each side of the equation.
-3 + 3 + -1a2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -1a2 = 0 + 3
-1a2 = 0 + 3

Combine like terms: 0 + 3 = 3
-1a2 = 3

Divide each side by '-1'.
a2 = -3

Simplifying
a2 = -3

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 + -5a2)' equal to zero and attempt to solve:

Simplifying
9 + -5a2 = 0

Solving
9 + -5a2 = 0

Move all terms containing a to the left, all other terms to the right.

Add '-9' to each side of the equation.
9 + -9 + -5a2 = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -5a2 = 0 + -9
-5a2 = 0 + -9

Combine like terms: 0 + -9 = -9
-5a2 = -9

Divide each side by '-5'.
a2 = 1.8

Simplifying
a2 = 1.8

Take the square root of each side:
a = {-1.341640787, 1.341640787}
Solution
a = {-1.341640787, 1.341640787}