x^4+4x^2=77

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Solution for x^4+4x^2=77 equation:


Simplifying
x4 + 4x2 = 77

Reorder the terms:
4x2 + x4 = 77

Solving
4x2 + x4 = 77

Solving for variable 'x'.

Reorder the terms:
-77 + 4x2 + x4 = 77 + -77

Combine like terms: 77 + -77 = 0
-77 + 4x2 + x4 = 0

Factor a trinomial.
(-11 + -1x2)(7 + -1x2) = 0

Subproblem 1

Set the factor '(-11 + -1x2)' equal to zero and attempt to solve: Simplifying -11 + -1x2 = 0 Solving -11 + -1x2 = 0 Move all terms containing x to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + -1x2 = 0 + 11 Combine like terms: -11 + 11 = 0 0 + -1x2 = 0 + 11 -1x2 = 0 + 11 Combine like terms: 0 + 11 = 11 -1x2 = 11 Divide each side by '-1'. x2 = -11 Simplifying x2 = -11 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 '(7 + -1x2)' equal to zero and attempt to solve: Simplifying 7 + -1x2 = 0 Solving 7 + -1x2 = 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 + -1x2 = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x2 = 0 + -7 -1x2 = 0 + -7 Combine like terms: 0 + -7 = -7 -1x2 = -7 Divide each side by '-1'. x2 = 7 Simplifying x2 = 7 Take the square root of each side: x = {-2.645751311, 2.645751311}

Solution

x = {-2.645751311, 2.645751311}

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