x^4=4x^2+45

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Solution for x^4=4x^2+45 equation:


Simplifying
x4 = 4x2 + 45

Reorder the terms:
x4 = 45 + 4x2

Solving
x4 = 45 + 4x2

Solving for variable 'x'.

Reorder the terms:
-45 + -4x2 + x4 = 45 + 4x2 + -45 + -4x2

Reorder the terms:
-45 + -4x2 + x4 = 45 + -45 + 4x2 + -4x2

Combine like terms: 45 + -45 = 0
-45 + -4x2 + x4 = 0 + 4x2 + -4x2
-45 + -4x2 + x4 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
-45 + -4x2 + x4 = 0

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

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

Subproblem 1

Set the factor '(-5 + -1x2)' equal to zero and attempt to solve: Simplifying -5 + -1x2 = 0 Solving -5 + -1x2 = 0 Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -1x2 = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1x2 = 0 + 5 -1x2 = 0 + 5 Combine like terms: 0 + 5 = 5 -1x2 = 5 Divide each side by '-1'. x2 = -5 Simplifying x2 = -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 + 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 = {-3, 3}

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