x^4+x^2=70

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Solution for x^4+x^2=70 equation:


Simplifying
x4 + x2 = 70

Reorder the terms:
x2 + x4 = 70

Solving
x2 + x4 = 70

Solving for variable 'x'.

Reorder the terms:
-70 + x2 + x4 = 70 + -70

Combine like terms: 70 + -70 = 0
-70 + x2 + x4 = 0

Begin completing the square.

Move the constant term to the right:

Add '70' to each side of the equation.
-70 + x2 + 70 + x4 = 0 + 70

Reorder the terms:
-70 + 70 + x2 + x4 = 0 + 70

Combine like terms: -70 + 70 = 0
0 + x2 + x4 = 0 + 70
x2 + x4 = 0 + 70

Combine like terms: 0 + 70 = 70
x2 + x4 = 70

The x term is x2.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
x2 + 0.25 + x4 = 70 + 0.25

Reorder the terms:
0.25 + x2 + x4 = 70 + 0.25

Combine like terms: 70 + 0.25 = 70.25
0.25 + x2 + x4 = 70.25

Factor a perfect square on the left side:
(x2 + 0.5)(x2 + 0.5) = 70.25

Calculate the square root of the right side: 8.381527307

Break this problem into two subproblems by setting 
(x2 + 0.5) equal to 8.381527307 and -8.381527307.

Subproblem 1

x2 + 0.5 = 8.381527307 Simplifying x2 + 0.5 = 8.381527307 Reorder the terms: 0.5 + x2 = 8.381527307 Solving 0.5 + x2 = 8.381527307 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x2 = 8.381527307 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x2 = 8.381527307 + -0.5 x2 = 8.381527307 + -0.5 Combine like terms: 8.381527307 + -0.5 = 7.881527307 x2 = 7.881527307 Simplifying x2 = 7.881527307 Take the square root of each side: x = {-2.807405797, 2.807405797}

Subproblem 2

x2 + 0.5 = -8.381527307 Simplifying x2 + 0.5 = -8.381527307 Reorder the terms: 0.5 + x2 = -8.381527307 Solving 0.5 + x2 = -8.381527307 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x2 = -8.381527307 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x2 = -8.381527307 + -0.5 x2 = -8.381527307 + -0.5 Combine like terms: -8.381527307 + -0.5 = -8.881527307 x2 = -8.881527307 Simplifying x2 = -8.881527307 Reorder the terms: 8.881527307 + x2 = -8.881527307 + 8.881527307 Combine like terms: -8.881527307 + 8.881527307 = 0.000000000 8.881527307 + x2 = 0.000000000 The solution to this equation could not be determined.This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

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