6x^4-14x^2=9

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Solution for 6x^4-14x^2=9 equation:


Simplifying
6x4 + -14x2 = 9

Reorder the terms:
-14x2 + 6x4 = 9

Solving
-14x2 + 6x4 = 9

Solving for variable 'x'.

Reorder the terms:
-9 + -14x2 + 6x4 = 9 + -9

Combine like terms: 9 + -9 = 0
-9 + -14x2 + 6x4 = 0

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

Divide each side by '6'.
-1.5 + -2.333333333x2 + x4 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + -2.333333333x2 + 1.5 + x4 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + -2.333333333x2 + x4 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + -2.333333333x2 + x4 = 0 + 1.5
-2.333333333x2 + x4 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
-2.333333333x2 + x4 = 1.5

The x term is -2.333333333x2.  Take half its coefficient (-1.166666667).
Square it (1.361111112) and add it to both sides.

Add '1.361111112' to each side of the equation.
-2.333333333x2 + 1.361111112 + x4 = 1.5 + 1.361111112

Reorder the terms:
1.361111112 + -2.333333333x2 + x4 = 1.5 + 1.361111112

Combine like terms: 1.5 + 1.361111112 = 2.861111112
1.361111112 + -2.333333333x2 + x4 = 2.861111112

Factor a perfect square on the left side:
(x2 + -1.166666667)(x2 + -1.166666667) = 2.861111112

Calculate the square root of the right side: 1.691481928

Break this problem into two subproblems by setting 
(x2 + -1.166666667) equal to 1.691481928 and -1.691481928.

Subproblem 1

x2 + -1.166666667 = 1.691481928 Simplifying x2 + -1.166666667 = 1.691481928 Reorder the terms: -1.166666667 + x2 = 1.691481928 Solving -1.166666667 + x2 = 1.691481928 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.166666667' to each side of the equation. -1.166666667 + 1.166666667 + x2 = 1.691481928 + 1.166666667 Combine like terms: -1.166666667 + 1.166666667 = 0.000000000 0.000000000 + x2 = 1.691481928 + 1.166666667 x2 = 1.691481928 + 1.166666667 Combine like terms: 1.691481928 + 1.166666667 = 2.858148595 x2 = 2.858148595 Simplifying x2 = 2.858148595 Take the square root of each side: x = {-1.690605985, 1.690605985}

Subproblem 2

x2 + -1.166666667 = -1.691481928 Simplifying x2 + -1.166666667 = -1.691481928 Reorder the terms: -1.166666667 + x2 = -1.691481928 Solving -1.166666667 + x2 = -1.691481928 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.166666667' to each side of the equation. -1.166666667 + 1.166666667 + x2 = -1.691481928 + 1.166666667 Combine like terms: -1.166666667 + 1.166666667 = 0.000000000 0.000000000 + x2 = -1.691481928 + 1.166666667 x2 = -1.691481928 + 1.166666667 Combine like terms: -1.691481928 + 1.166666667 = -0.524815261 x2 = -0.524815261 Simplifying x2 = -0.524815261 Reorder the terms: 0.524815261 + x2 = -0.524815261 + 0.524815261 Combine like terms: -0.524815261 + 0.524815261 = 0.000000000 0.524815261 + x2 = 0.000000000 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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