=5x^4-45x^2-12

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Solution for =5x^4-45x^2-12 equation:


Simplifying
0 = 5x4 + -45x2 + -12

Reorder the terms:
0 = -12 + -45x2 + 5x4

Solving
0 = -12 + -45x2 + 5x4

Solving for variable 'x'.

Combine like terms: 0 + 12 = 12
12 + 45x2 + -5x4 = -12 + -45x2 + 5x4 + 12 + 45x2 + -5x4

Reorder the terms:
12 + 45x2 + -5x4 = -12 + 12 + -45x2 + 45x2 + 5x4 + -5x4

Combine like terms: -12 + 12 = 0
12 + 45x2 + -5x4 = 0 + -45x2 + 45x2 + 5x4 + -5x4
12 + 45x2 + -5x4 = -45x2 + 45x2 + 5x4 + -5x4

Combine like terms: -45x2 + 45x2 = 0
12 + 45x2 + -5x4 = 0 + 5x4 + -5x4
12 + 45x2 + -5x4 = 5x4 + -5x4

Combine like terms: 5x4 + -5x4 = 0
12 + 45x2 + -5x4 = 0

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
-2.4 + -9x2 + x4 = 0

Move the constant term to the right:

Add '2.4' to each side of the equation.
-2.4 + -9x2 + 2.4 + x4 = 0 + 2.4

Reorder the terms:
-2.4 + 2.4 + -9x2 + x4 = 0 + 2.4

Combine like terms: -2.4 + 2.4 = 0.0
0.0 + -9x2 + x4 = 0 + 2.4
-9x2 + x4 = 0 + 2.4

Combine like terms: 0 + 2.4 = 2.4
-9x2 + x4 = 2.4

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 = 2.4 + 20.25

Reorder the terms:
20.25 + -9x2 + x4 = 2.4 + 20.25

Combine like terms: 2.4 + 20.25 = 22.65
20.25 + -9x2 + x4 = 22.65

Factor a perfect square on the left side:
(x2 + -4.5)(x2 + -4.5) = 22.65

Calculate the square root of the right side: 4.759201614

Break this problem into two subproblems by setting 
(x2 + -4.5) equal to 4.759201614 and -4.759201614.

Subproblem 1

x2 + -4.5 = 4.759201614 Simplifying x2 + -4.5 = 4.759201614 Reorder the terms: -4.5 + x2 = 4.759201614 Solving -4.5 + x2 = 4.759201614 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 = 4.759201614 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x2 = 4.759201614 + 4.5 x2 = 4.759201614 + 4.5 Combine like terms: 4.759201614 + 4.5 = 9.259201614 x2 = 9.259201614 Simplifying x2 = 9.259201614 Take the square root of each side: x = {-3.042893625, 3.042893625}

Subproblem 2

x2 + -4.5 = -4.759201614 Simplifying x2 + -4.5 = -4.759201614 Reorder the terms: -4.5 + x2 = -4.759201614 Solving -4.5 + x2 = -4.759201614 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 = -4.759201614 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x2 = -4.759201614 + 4.5 x2 = -4.759201614 + 4.5 Combine like terms: -4.759201614 + 4.5 = -0.259201614 x2 = -0.259201614 Simplifying x2 = -0.259201614 Reorder the terms: 0.259201614 + x2 = -0.259201614 + 0.259201614 Combine like terms: -0.259201614 + 0.259201614 = 0.000000000 0.259201614 + 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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