15x^4-170x^2+315=

Solution for 15x^4-170x^2+315= equation:

Simplifying
15x4 + -170x2 + 315 = 0

Reorder the terms:
315 + -170x2 + 15x4 = 0

Solving
315 + -170x2 + 15x4 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '5'.
5(63 + -34x2 + 3x4) = 0

Factor a trinomial.
5((7 + -3x2)(9 + -1x2)) = 0

Factor a difference between two squares.
5((7 + -3x2)((3 + x)(3 + -1x))) = 0

Ignore the factor 5.
Subproblem 1
Set the factor '(7 + -3x2)' equal to zero and attempt to solve:

Simplifying
7 + -3x2 = 0

Solving
7 + -3x2 = 0

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

Add '-7' to each side of the equation.
7 + -7 + -3x2 = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -3x2 = 0 + -7
-3x2 = 0 + -7

Combine like terms: 0 + -7 = -7
-3x2 = -7

Divide each side by '-3'.
x2 = 2.333333333

Simplifying
x2 = 2.333333333

Take the square root of each side:
x = {-1.527525232, 1.527525232}
Subproblem 2
Set the factor '(3 + x)' equal to zero and attempt to solve:

Simplifying
3 + x = 0

Solving
3 + x = 0

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

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

Combine like terms: 3 + -3 = 0
0 + x = 0 + -3
x = 0 + -3

Combine like terms: 0 + -3 = -3
x = -3

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

Simplifying
3 + -1x = 0

Solving
3 + -1x = 0

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

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

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

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

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

Simplifying
x = 3
Solution
x = {-1.527525232, 1.527525232, -3, 3}