4x^4+20x^2=144

Solution for 4x^4+20x^2=144 equation:

Simplifying
4x4 + 20x2 = 144

Reorder the terms:
20x2 + 4x4 = 144

Solving
20x2 + 4x4 = 144

Solving for variable 'x'.

Reorder the terms:
-144 + 20x2 + 4x4 = 144 + -144

Combine like terms: 144 + -144 = 0
-144 + 20x2 + 4x4 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-36 + 5x2 + x4) = 0

Factor a trinomial.
4((-9 + -1x2)(4 + -1x2)) = 0

Factor a difference between two squares.
4((-9 + -1x2)((2 + x)(2 + -1x))) = 0

Ignore the factor 4.
Subproblem 1
Set the factor '(-9 + -1x2)' equal to zero and attempt to solve:

Simplifying
-9 + -1x2 = 0

Solving
-9 + -1x2 = 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 + -1x2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -1x2 = 0 + 9
-1x2 = 0 + 9

Combine like terms: 0 + 9 = 9
-1x2 = 9

Divide each side by '-1'.
x2 = -9

Simplifying
x2 = -9

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 '(2 + x)' equal to zero and attempt to solve:

Simplifying
2 + x = 0

Solving
2 + x = 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 + x = 0 + -2

Combine like terms: 2 + -2 = 0
0 + x = 0 + -2
x = 0 + -2

Combine like terms: 0 + -2 = -2
x = -2

Simplifying
x = -2
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 = {-2, 2}