=3*b^4+5.729577951*b^2-8.207015875

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Solution for =3*b^4+5.729577951*b^2-8.207015875 equation:


Simplifying
0 = 3b4 + 5.729577951b2 + -8.207015875

Reorder the terms:
0 = -8.207015875 + 5.729577951b2 + 3b4

Solving
0 = -8.207015875 + 5.729577951b2 + 3b4

Solving for variable 'b'.

Combine like terms: 0 + 8.207015875 = 8.207015875
8.207015875 + -5.729577951b2 + -3b4 = -8.207015875 + 5.729577951b2 + 3b4 + 8.207015875 + -5.729577951b2 + -3b4

Reorder the terms:
8.207015875 + -5.729577951b2 + -3b4 = -8.207015875 + 8.207015875 + 5.729577951b2 + -5.729577951b2 + 3b4 + -3b4

Combine like terms: -8.207015875 + 8.207015875 = 0.000000000
8.207015875 + -5.729577951b2 + -3b4 = 0.000000000 + 5.729577951b2 + -5.729577951b2 + 3b4 + -3b4
8.207015875 + -5.729577951b2 + -3b4 = 5.729577951b2 + -5.729577951b2 + 3b4 + -3b4

Combine like terms: 5.729577951b2 + -5.729577951b2 = 0.000000000
8.207015875 + -5.729577951b2 + -3b4 = 0.000000000 + 3b4 + -3b4
8.207015875 + -5.729577951b2 + -3b4 = 3b4 + -3b4

Combine like terms: 3b4 + -3b4 = 0
8.207015875 + -5.729577951b2 + -3b4 = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-2.735671958 + 1.909859317b2 + b4 = 0

Move the constant term to the right:

Add '2.735671958' to each side of the equation.
-2.735671958 + 1.909859317b2 + 2.735671958 + b4 = 0 + 2.735671958

Reorder the terms:
-2.735671958 + 2.735671958 + 1.909859317b2 + b4 = 0 + 2.735671958

Combine like terms: -2.735671958 + 2.735671958 = 0.000000000
0.000000000 + 1.909859317b2 + b4 = 0 + 2.735671958
1.909859317b2 + b4 = 0 + 2.735671958

Combine like terms: 0 + 2.735671958 = 2.735671958
1.909859317b2 + b4 = 2.735671958

The b term is 1.909859317b2.  Take half its coefficient (0.9549296585).
Square it (0.9118906527) and add it to both sides.

Add '0.9118906527' to each side of the equation.
1.909859317b2 + 0.9118906527 + b4 = 2.735671958 + 0.9118906527

Reorder the terms:
0.9118906527 + 1.909859317b2 + b4 = 2.735671958 + 0.9118906527

Combine like terms: 2.735671958 + 0.9118906527 = 3.6475626107
0.9118906527 + 1.909859317b2 + b4 = 3.6475626107

Factor a perfect square on the left side:
(b2 + 0.9549296585)(b2 + 0.9549296585) = 3.6475626107

Calculate the square root of the right side: 1.909859317

Break this problem into two subproblems by setting 
(b2 + 0.9549296585) equal to 1.909859317 and -1.909859317.

Subproblem 1

b2 + 0.9549296585 = 1.909859317 Simplifying b2 + 0.9549296585 = 1.909859317 Reorder the terms: 0.9549296585 + b2 = 1.909859317 Solving 0.9549296585 + b2 = 1.909859317 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-0.9549296585' to each side of the equation. 0.9549296585 + -0.9549296585 + b2 = 1.909859317 + -0.9549296585 Combine like terms: 0.9549296585 + -0.9549296585 = 0.0000000000 0.0000000000 + b2 = 1.909859317 + -0.9549296585 b2 = 1.909859317 + -0.9549296585 Combine like terms: 1.909859317 + -0.9549296585 = 0.9549296585 b2 = 0.9549296585 Simplifying b2 = 0.9549296585 Take the square root of each side: b = {-0.977205024, 0.977205024}

Subproblem 2

b2 + 0.9549296585 = -1.909859317 Simplifying b2 + 0.9549296585 = -1.909859317 Reorder the terms: 0.9549296585 + b2 = -1.909859317 Solving 0.9549296585 + b2 = -1.909859317 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-0.9549296585' to each side of the equation. 0.9549296585 + -0.9549296585 + b2 = -1.909859317 + -0.9549296585 Combine like terms: 0.9549296585 + -0.9549296585 = 0.0000000000 0.0000000000 + b2 = -1.909859317 + -0.9549296585 b2 = -1.909859317 + -0.9549296585 Combine like terms: -1.909859317 + -0.9549296585 = -2.8647889755 b2 = -2.8647889755 Simplifying b2 = -2.8647889755 Reorder the terms: 2.8647889755 + b2 = -2.8647889755 + 2.8647889755 Combine like terms: -2.8647889755 + 2.8647889755 = 0.0000000000 2.8647889755 + b2 = 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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