(r*r*r-8)(r*r*r-1)=0

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Solution for (r*r*r-8)(r*r*r-1)=0 equation:


Simplifying
(r * r * r + -8)(r * r * r + -1) = 0

Multiply r * r
(r2 * r + -8)(r * r * r + -1) = 0

Multiply r2 * r
(r3 + -8)(r * r * r + -1) = 0

Reorder the terms:
(-8 + r3)(r * r * r + -1) = 0

Multiply r * r
(-8 + r3)(r2 * r + -1) = 0

Multiply r2 * r
(-8 + r3)(r3 + -1) = 0

Reorder the terms:
(-8 + r3)(-1 + r3) = 0

Multiply (-8 + r3) * (-1 + r3)
(-8(-1 + r3) + r3(-1 + r3)) = 0
((-1 * -8 + r3 * -8) + r3(-1 + r3)) = 0
((8 + -8r3) + r3(-1 + r3)) = 0
(8 + -8r3 + (-1 * r3 + r3 * r3)) = 0
(8 + -8r3 + (-1r3 + r6)) = 0

Combine like terms: -8r3 + -1r3 = -9r3
(8 + -9r3 + r6) = 0

Solving
8 + -9r3 + r6 = 0

Solving for variable 'r'.

Factor a trinomial.
(1 + -1r3)(8 + -1r3) = 0

Subproblem 1

Set the factor '(1 + -1r3)' equal to zero and attempt to solve: Simplifying 1 + -1r3 = 0 Solving 1 + -1r3 = 0 Move all terms containing r to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -1r3 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -1r3 = 0 + -1 -1r3 = 0 + -1 Combine like terms: 0 + -1 = -1 -1r3 = -1 Divide each side by '-1'. r3 = 1 Simplifying r3 = 1 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 2

Set the factor '(8 + -1r3)' equal to zero and attempt to solve: Simplifying 8 + -1r3 = 0 Solving 8 + -1r3 = 0 Move all terms containing r to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1r3 = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1r3 = 0 + -8 -1r3 = 0 + -8 Combine like terms: 0 + -8 = -8 -1r3 = -8 Divide each side by '-1'. r3 = 8 Simplifying r3 = 8 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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