t^4+3t^2-2=0

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Solution for t^4+3t^2-2=0 equation:


Simplifying
t4 + 3t2 + -2 = 0

Reorder the terms:
-2 + 3t2 + t4 = 0

Solving
-2 + 3t2 + t4 = 0

Solving for variable 't'.

Begin completing the square.

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + 3t2 + 2 + t4 = 0 + 2

Reorder the terms:
-2 + 2 + 3t2 + t4 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + 3t2 + t4 = 0 + 2
3t2 + t4 = 0 + 2

Combine like terms: 0 + 2 = 2
3t2 + t4 = 2

The t term is 3t2.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3t2 + 2.25 + t4 = 2 + 2.25

Reorder the terms:
2.25 + 3t2 + t4 = 2 + 2.25

Combine like terms: 2 + 2.25 = 4.25
2.25 + 3t2 + t4 = 4.25

Factor a perfect square on the left side:
(t2 + 1.5)(t2 + 1.5) = 4.25

Calculate the square root of the right side: 2.061552813

Break this problem into two subproblems by setting 
(t2 + 1.5) equal to 2.061552813 and -2.061552813.

Subproblem 1

t2 + 1.5 = 2.061552813 Simplifying t2 + 1.5 = 2.061552813 Reorder the terms: 1.5 + t2 = 2.061552813 Solving 1.5 + t2 = 2.061552813 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + t2 = 2.061552813 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + t2 = 2.061552813 + -1.5 t2 = 2.061552813 + -1.5 Combine like terms: 2.061552813 + -1.5 = 0.561552813 t2 = 0.561552813 Simplifying t2 = 0.561552813 Take the square root of each side: t = {-0.749368276, 0.749368276}

Subproblem 2

t2 + 1.5 = -2.061552813 Simplifying t2 + 1.5 = -2.061552813 Reorder the terms: 1.5 + t2 = -2.061552813 Solving 1.5 + t2 = -2.061552813 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + t2 = -2.061552813 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + t2 = -2.061552813 + -1.5 t2 = -2.061552813 + -1.5 Combine like terms: -2.061552813 + -1.5 = -3.561552813 t2 = -3.561552813 Simplifying t2 = -3.561552813 Reorder the terms: 3.561552813 + t2 = -3.561552813 + 3.561552813 Combine like terms: -3.561552813 + 3.561552813 = 0.000000000 3.561552813 + t2 = 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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