36x^4-85x^2+-49=0

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Solution for 36x^4-85x^2+-49=0 equation:


Simplifying
36x4 + -85x2 + -49 = 0

Reorder the terms:
-49 + -85x2 + 36x4 = 0

Solving
-49 + -85x2 + 36x4 = 0

Solving for variable 'x'.

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

Divide each side by '36'.
-1.361111111 + -2.361111111x2 + x4 = 0

Move the constant term to the right:

Add '1.361111111' to each side of the equation.
-1.361111111 + -2.361111111x2 + 1.361111111 + x4 = 0 + 1.361111111

Reorder the terms:
-1.361111111 + 1.361111111 + -2.361111111x2 + x4 = 0 + 1.361111111

Combine like terms: -1.361111111 + 1.361111111 = 0.000000000
0.000000000 + -2.361111111x2 + x4 = 0 + 1.361111111
-2.361111111x2 + x4 = 0 + 1.361111111

Combine like terms: 0 + 1.361111111 = 1.361111111
-2.361111111x2 + x4 = 1.361111111

The x term is -2.361111111x2.  Take half its coefficient (-1.180555556).
Square it (1.393711421) and add it to both sides.

Add '1.393711421' to each side of the equation.
-2.361111111x2 + 1.393711421 + x4 = 1.361111111 + 1.393711421

Reorder the terms:
1.393711421 + -2.361111111x2 + x4 = 1.361111111 + 1.393711421

Combine like terms: 1.361111111 + 1.393711421 = 2.754822532
1.393711421 + -2.361111111x2 + x4 = 2.754822532

Factor a perfect square on the left side:
(x2 + -1.180555556)(x2 + -1.180555556) = 2.754822532

Calculate the square root of the right side: 1.659765806

Break this problem into two subproblems by setting 
(x2 + -1.180555556) equal to 1.659765806 and -1.659765806.

Subproblem 1

x2 + -1.180555556 = 1.659765806 Simplifying x2 + -1.180555556 = 1.659765806 Reorder the terms: -1.180555556 + x2 = 1.659765806 Solving -1.180555556 + x2 = 1.659765806 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.180555556' to each side of the equation. -1.180555556 + 1.180555556 + x2 = 1.659765806 + 1.180555556 Combine like terms: -1.180555556 + 1.180555556 = 0.000000000 0.000000000 + x2 = 1.659765806 + 1.180555556 x2 = 1.659765806 + 1.180555556 Combine like terms: 1.659765806 + 1.180555556 = 2.840321362 x2 = 2.840321362 Simplifying x2 = 2.840321362 Take the square root of each side: x = {-1.685325299, 1.685325299}

Subproblem 2

x2 + -1.180555556 = -1.659765806 Simplifying x2 + -1.180555556 = -1.659765806 Reorder the terms: -1.180555556 + x2 = -1.659765806 Solving -1.180555556 + x2 = -1.659765806 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.180555556' to each side of the equation. -1.180555556 + 1.180555556 + x2 = -1.659765806 + 1.180555556 Combine like terms: -1.180555556 + 1.180555556 = 0.000000000 0.000000000 + x2 = -1.659765806 + 1.180555556 x2 = -1.659765806 + 1.180555556 Combine like terms: -1.659765806 + 1.180555556 = -0.47921025 x2 = -0.47921025 Simplifying x2 = -0.47921025 Reorder the terms: 0.47921025 + x2 = -0.47921025 + 0.47921025 Combine like terms: -0.47921025 + 0.47921025 = 0.00000000 0.47921025 + x2 = 0.00000000 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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