1+9x^2-x^4=

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Solution for 1+9x^2-x^4= equation:


Simplifying
1 + 9x2 + -1x4 = 0

Solving
1 + 9x2 + -1x4 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-1 + -9x2 + x4 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -9x2 + 1 + x4 = 0 + 1

Reorder the terms:
-1 + 1 + -9x2 + x4 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -9x2 + x4 = 0 + 1
-9x2 + x4 = 0 + 1

Combine like terms: 0 + 1 = 1
-9x2 + x4 = 1

The x term is -9x2.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9x2 + 20.25 + x4 = 1 + 20.25

Reorder the terms:
20.25 + -9x2 + x4 = 1 + 20.25

Combine like terms: 1 + 20.25 = 21.25
20.25 + -9x2 + x4 = 21.25

Factor a perfect square on the left side:
(x2 + -4.5)(x2 + -4.5) = 21.25

Calculate the square root of the right side: 4.609772229

Break this problem into two subproblems by setting 
(x2 + -4.5) equal to 4.609772229 and -4.609772229.

Subproblem 1

x2 + -4.5 = 4.609772229 Simplifying x2 + -4.5 = 4.609772229 Reorder the terms: -4.5 + x2 = 4.609772229 Solving -4.5 + x2 = 4.609772229 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x2 = 4.609772229 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x2 = 4.609772229 + 4.5 x2 = 4.609772229 + 4.5 Combine like terms: 4.609772229 + 4.5 = 9.109772229 x2 = 9.109772229 Simplifying x2 = 9.109772229 Take the square root of each side: x = {-3.018239922, 3.018239922}

Subproblem 2

x2 + -4.5 = -4.609772229 Simplifying x2 + -4.5 = -4.609772229 Reorder the terms: -4.5 + x2 = -4.609772229 Solving -4.5 + x2 = -4.609772229 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x2 = -4.609772229 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x2 = -4.609772229 + 4.5 x2 = -4.609772229 + 4.5 Combine like terms: -4.609772229 + 4.5 = -0.109772229 x2 = -0.109772229 Simplifying x2 = -0.109772229 Reorder the terms: 0.109772229 + x2 = -0.109772229 + 0.109772229 Combine like terms: -0.109772229 + 0.109772229 = 0.000000000 0.109772229 + 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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