6x^4-5x^2-7=0

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Solution for 6x^4-5x^2-7=0 equation:


Simplifying
6x4 + -5x2 + -7 = 0

Reorder the terms:
-7 + -5x2 + 6x4 = 0

Solving
-7 + -5x2 + 6x4 = 0

Solving for variable 'x'.

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

Divide each side by '6'.
-1.166666667 + -0.8333333333x2 + x4 = 0

Move the constant term to the right:

Add '1.166666667' to each side of the equation.
-1.166666667 + -0.8333333333x2 + 1.166666667 + x4 = 0 + 1.166666667

Reorder the terms:
-1.166666667 + 1.166666667 + -0.8333333333x2 + x4 = 0 + 1.166666667

Combine like terms: -1.166666667 + 1.166666667 = 0.000000000
0.000000000 + -0.8333333333x2 + x4 = 0 + 1.166666667
-0.8333333333x2 + x4 = 0 + 1.166666667

Combine like terms: 0 + 1.166666667 = 1.166666667
-0.8333333333x2 + x4 = 1.166666667

The x term is -0.8333333333x2.  Take half its coefficient (-0.4166666667).
Square it (0.1736111111) and add it to both sides.

Add '0.1736111111' to each side of the equation.
-0.8333333333x2 + 0.1736111111 + x4 = 1.166666667 + 0.1736111111

Reorder the terms:
0.1736111111 + -0.8333333333x2 + x4 = 1.166666667 + 0.1736111111

Combine like terms: 1.166666667 + 0.1736111111 = 1.3402777781
0.1736111111 + -0.8333333333x2 + x4 = 1.3402777781

Factor a perfect square on the left side:
(x2 + -0.4166666667)(x2 + -0.4166666667) = 1.3402777781

Calculate the square root of the right side: 1.157703666

Break this problem into two subproblems by setting 
(x2 + -0.4166666667) equal to 1.157703666 and -1.157703666.

Subproblem 1

x2 + -0.4166666667 = 1.157703666 Simplifying x2 + -0.4166666667 = 1.157703666 Reorder the terms: -0.4166666667 + x2 = 1.157703666 Solving -0.4166666667 + x2 = 1.157703666 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4166666667' to each side of the equation. -0.4166666667 + 0.4166666667 + x2 = 1.157703666 + 0.4166666667 Combine like terms: -0.4166666667 + 0.4166666667 = 0.0000000000 0.0000000000 + x2 = 1.157703666 + 0.4166666667 x2 = 1.157703666 + 0.4166666667 Combine like terms: 1.157703666 + 0.4166666667 = 1.5743703327 x2 = 1.5743703327 Simplifying x2 = 1.5743703327 Take the square root of each side: x = {-1.254739149, 1.254739149}

Subproblem 2

x2 + -0.4166666667 = -1.157703666 Simplifying x2 + -0.4166666667 = -1.157703666 Reorder the terms: -0.4166666667 + x2 = -1.157703666 Solving -0.4166666667 + x2 = -1.157703666 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4166666667' to each side of the equation. -0.4166666667 + 0.4166666667 + x2 = -1.157703666 + 0.4166666667 Combine like terms: -0.4166666667 + 0.4166666667 = 0.0000000000 0.0000000000 + x2 = -1.157703666 + 0.4166666667 x2 = -1.157703666 + 0.4166666667 Combine like terms: -1.157703666 + 0.4166666667 = -0.7410369993 x2 = -0.7410369993 Simplifying x2 = -0.7410369993 Reorder the terms: 0.7410369993 + x2 = -0.7410369993 + 0.7410369993 Combine like terms: -0.7410369993 + 0.7410369993 = 0.0000000000 0.7410369993 + 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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