0.25x^6=4x^3-15

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Solution for 0.25x^6=4x^3-15 equation:


Simplifying
0.25x6 = 4x3 + -15

Reorder the terms:
0.25x6 = -15 + 4x3

Solving
0.25x6 = -15 + 4x3

Solving for variable 'x'.

Reorder the terms:
15 + -4x3 + 0.25x6 = -15 + 4x3 + 15 + -4x3

Reorder the terms:
15 + -4x3 + 0.25x6 = -15 + 15 + 4x3 + -4x3

Combine like terms: -15 + 15 = 0
15 + -4x3 + 0.25x6 = 0 + 4x3 + -4x3
15 + -4x3 + 0.25x6 = 4x3 + -4x3

Combine like terms: 4x3 + -4x3 = 0
15 + -4x3 + 0.25x6 = 0

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

Divide each side by '0.25'.
60 + -16x3 + x6 = 0

Move the constant term to the right:

Add '-60' to each side of the equation.
60 + -16x3 + -60 + x6 = 0 + -60

Reorder the terms:
60 + -60 + -16x3 + x6 = 0 + -60

Combine like terms: 60 + -60 = 0
0 + -16x3 + x6 = 0 + -60
-16x3 + x6 = 0 + -60

Combine like terms: 0 + -60 = -60
-16x3 + x6 = -60

The x term is -16x3.  Take half its coefficient (-8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
-16x3 + 64 + x6 = -60 + 64

Reorder the terms:
64 + -16x3 + x6 = -60 + 64

Combine like terms: -60 + 64 = 4
64 + -16x3 + x6 = 4

Factor a perfect square on the left side:
(x3 + -8)(x3 + -8) = 4

Calculate the square root of the right side: 2

Break this problem into two subproblems by setting 
(x3 + -8) equal to 2 and -2.

Subproblem 1

x3 + -8 = 2 Simplifying x3 + -8 = 2 Reorder the terms: -8 + x3 = 2 Solving -8 + x3 = 2 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + x3 = 2 + 8 Combine like terms: -8 + 8 = 0 0 + x3 = 2 + 8 x3 = 2 + 8 Combine like terms: 2 + 8 = 10 x3 = 10 Simplifying x3 = 10 Reorder the terms: -10 + x3 = 10 + -10 Combine like terms: 10 + -10 = 0 -10 + x3 = 0 The solution to this equation could not be determined.This subproblem is being ignored because a solution could not be determined.

Subproblem 2

x3 + -8 = -2 Simplifying x3 + -8 = -2 Reorder the terms: -8 + x3 = -2 Solving -8 + x3 = -2 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + x3 = -2 + 8 Combine like terms: -8 + 8 = 0 0 + x3 = -2 + 8 x3 = -2 + 8 Combine like terms: -2 + 8 = 6 x3 = 6 Simplifying x3 = 6 Reorder the terms: -6 + x3 = 6 + -6 Combine like terms: 6 + -6 = 0 -6 + x3 = 0 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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