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Simplifying r4 + -16 = 0 Reorder the terms: -16 + r4 = 0 Solving -16 + r4 = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + r4 = 0 + 16 Combine like terms: -16 + 16 = 0 0 + r4 = 0 + 16 r4 = 0 + 16 Combine like terms: 0 + 16 = 16 r4 = 16 Simplifying r4 = 16 Reorder the terms: -16 + r4 = 16 + -16 Combine like terms: 16 + -16 = 0 -16 + r4 = 0 Factor a difference between two squares. (4 + r2)(-4 + r2) = 0 Factor a difference between two squares. (4 + r2)((2 + r)(-2 + r)) = 0Subproblem 1
Set the factor '(4 + r2)' equal to zero and attempt to solve: Simplifying 4 + r2 = 0 Solving 4 + r2 = 0 Move all terms containing r to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + r2 = 0 + -4 Combine like terms: 4 + -4 = 0 0 + r2 = 0 + -4 r2 = 0 + -4 Combine like terms: 0 + -4 = -4 r2 = -4 Simplifying r2 = -4 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 '(2 + r)' equal to zero and attempt to solve: Simplifying 2 + r = 0 Solving 2 + r = 0 Move all terms containing r to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + r = 0 + -2 Combine like terms: 2 + -2 = 0 0 + r = 0 + -2 r = 0 + -2 Combine like terms: 0 + -2 = -2 r = -2 Simplifying r = -2Subproblem 3
Set the factor '(-2 + r)' equal to zero and attempt to solve: Simplifying -2 + r = 0 Solving -2 + r = 0 Move all terms containing r to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + r = 0 + 2 Combine like terms: -2 + 2 = 0 0 + r = 0 + 2 r = 0 + 2 Combine like terms: 0 + 2 = 2 r = 2 Simplifying r = 2Solution
r = {-2, 2}
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