7t^4-10t^2+1=0

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Solution for 7t^4-10t^2+1=0 equation:


Simplifying
7t4 + -10t2 + 1 = 0

Reorder the terms:
1 + -10t2 + 7t4 = 0

Solving
1 + -10t2 + 7t4 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
7 the coefficient of the squared term: 

Divide each side by '7'.
0.1428571429 + -1.428571429t2 + t4 = 0

Move the constant term to the right:

Add '-0.1428571429' to each side of the equation.
0.1428571429 + -1.428571429t2 + -0.1428571429 + t4 = 0 + -0.1428571429

Reorder the terms:
0.1428571429 + -0.1428571429 + -1.428571429t2 + t4 = 0 + -0.1428571429

Combine like terms: 0.1428571429 + -0.1428571429 = 0.0000000000
0.0000000000 + -1.428571429t2 + t4 = 0 + -0.1428571429
-1.428571429t2 + t4 = 0 + -0.1428571429

Combine like terms: 0 + -0.1428571429 = -0.1428571429
-1.428571429t2 + t4 = -0.1428571429

The t term is -1.428571429t2.  Take half its coefficient (-0.7142857145).
Square it (0.5102040819) and add it to both sides.

Add '0.5102040819' to each side of the equation.
-1.428571429t2 + 0.5102040819 + t4 = -0.1428571429 + 0.5102040819

Reorder the terms:
0.5102040819 + -1.428571429t2 + t4 = -0.1428571429 + 0.5102040819

Combine like terms: -0.1428571429 + 0.5102040819 = 0.367346939
0.5102040819 + -1.428571429t2 + t4 = 0.367346939

Factor a perfect square on the left side:
(t2 + -0.7142857145)(t2 + -0.7142857145) = 0.367346939

Calculate the square root of the right side: 0.606091527

Break this problem into two subproblems by setting 
(t2 + -0.7142857145) equal to 0.606091527 and -0.606091527.

Subproblem 1

t2 + -0.7142857145 = 0.606091527 Simplifying t2 + -0.7142857145 = 0.606091527 Reorder the terms: -0.7142857145 + t2 = 0.606091527 Solving -0.7142857145 + t2 = 0.606091527 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.7142857145' to each side of the equation. -0.7142857145 + 0.7142857145 + t2 = 0.606091527 + 0.7142857145 Combine like terms: -0.7142857145 + 0.7142857145 = 0.0000000000 0.0000000000 + t2 = 0.606091527 + 0.7142857145 t2 = 0.606091527 + 0.7142857145 Combine like terms: 0.606091527 + 0.7142857145 = 1.3203772415 t2 = 1.3203772415 Simplifying t2 = 1.3203772415 Take the square root of each side: t = {-1.149076691, 1.149076691}

Subproblem 2

t2 + -0.7142857145 = -0.606091527 Simplifying t2 + -0.7142857145 = -0.606091527 Reorder the terms: -0.7142857145 + t2 = -0.606091527 Solving -0.7142857145 + t2 = -0.606091527 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.7142857145' to each side of the equation. -0.7142857145 + 0.7142857145 + t2 = -0.606091527 + 0.7142857145 Combine like terms: -0.7142857145 + 0.7142857145 = 0.0000000000 0.0000000000 + t2 = -0.606091527 + 0.7142857145 t2 = -0.606091527 + 0.7142857145 Combine like terms: -0.606091527 + 0.7142857145 = 0.1081941875 t2 = 0.1081941875 Simplifying t2 = 0.1081941875 Take the square root of each side: t = {-0.328928849, 0.328928849}

Solution

The solution to the problem is based on the solutions from the subproblems. t = {-1.149076691, 1.149076691, -0.328928849, 0.328928849}

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