7x^4+5x^2-10=0

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Solution for 7x^4+5x^2-10=0 equation:


Simplifying
7x4 + 5x2 + -10 = 0

Reorder the terms:
-10 + 5x2 + 7x4 = 0

Solving
-10 + 5x2 + 7x4 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
-1.428571429 + 0.7142857143x2 + x4 = 0

Move the constant term to the right:

Add '1.428571429' to each side of the equation.
-1.428571429 + 0.7142857143x2 + 1.428571429 + x4 = 0 + 1.428571429

Reorder the terms:
-1.428571429 + 1.428571429 + 0.7142857143x2 + x4 = 0 + 1.428571429

Combine like terms: -1.428571429 + 1.428571429 = 0.000000000
0.000000000 + 0.7142857143x2 + x4 = 0 + 1.428571429
0.7142857143x2 + x4 = 0 + 1.428571429

Combine like terms: 0 + 1.428571429 = 1.428571429
0.7142857143x2 + x4 = 1.428571429

The x term is 0.7142857143x2.  Take half its coefficient (0.3571428572).
Square it (0.1275510204) and add it to both sides.

Add '0.1275510204' to each side of the equation.
0.7142857143x2 + 0.1275510204 + x4 = 1.428571429 + 0.1275510204

Reorder the terms:
0.1275510204 + 0.7142857143x2 + x4 = 1.428571429 + 0.1275510204

Combine like terms: 1.428571429 + 0.1275510204 = 1.5561224494
0.1275510204 + 0.7142857143x2 + x4 = 1.5561224494

Factor a perfect square on the left side:
(x2 + 0.3571428572)(x2 + 0.3571428572) = 1.5561224494

Calculate the square root of the right side: 1.247446371

Break this problem into two subproblems by setting 
(x2 + 0.3571428572) equal to 1.247446371 and -1.247446371.

Subproblem 1

x2 + 0.3571428572 = 1.247446371 Simplifying x2 + 0.3571428572 = 1.247446371 Reorder the terms: 0.3571428572 + x2 = 1.247446371 Solving 0.3571428572 + x2 = 1.247446371 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3571428572' to each side of the equation. 0.3571428572 + -0.3571428572 + x2 = 1.247446371 + -0.3571428572 Combine like terms: 0.3571428572 + -0.3571428572 = 0.0000000000 0.0000000000 + x2 = 1.247446371 + -0.3571428572 x2 = 1.247446371 + -0.3571428572 Combine like terms: 1.247446371 + -0.3571428572 = 0.8903035138 x2 = 0.8903035138 Simplifying x2 = 0.8903035138 Take the square root of each side: x = {-0.943558961, 0.943558961}

Subproblem 2

x2 + 0.3571428572 = -1.247446371 Simplifying x2 + 0.3571428572 = -1.247446371 Reorder the terms: 0.3571428572 + x2 = -1.247446371 Solving 0.3571428572 + x2 = -1.247446371 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3571428572' to each side of the equation. 0.3571428572 + -0.3571428572 + x2 = -1.247446371 + -0.3571428572 Combine like terms: 0.3571428572 + -0.3571428572 = 0.0000000000 0.0000000000 + x2 = -1.247446371 + -0.3571428572 x2 = -1.247446371 + -0.3571428572 Combine like terms: -1.247446371 + -0.3571428572 = -1.6045892282 x2 = -1.6045892282 Simplifying x2 = -1.6045892282 Reorder the terms: 1.6045892282 + x2 = -1.6045892282 + 1.6045892282 Combine like terms: -1.6045892282 + 1.6045892282 = 0.0000000000 1.6045892282 + x2 = 0.0000000000 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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