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Simplifying r4 + -16r2 + 64 = 0 Reorder the terms: 64 + -16r2 + r4 = 0 Solving 64 + -16r2 + r4 = 0 Solving for variable 'r'. Factor a trinomial. (8 + -1r2)(8 + -1r2) = 0Subproblem 1
Set the factor '(8 + -1r2)' equal to zero and attempt to solve: Simplifying 8 + -1r2 = 0 Solving 8 + -1r2 = 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 + -1r2 = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1r2 = 0 + -8 -1r2 = 0 + -8 Combine like terms: 0 + -8 = -8 -1r2 = -8 Divide each side by '-1'. r2 = 8 Simplifying r2 = 8 Take the square root of each side: r = {-2.828427125, 2.828427125}Subproblem 2
Set the factor '(8 + -1r2)' equal to zero and attempt to solve: Simplifying 8 + -1r2 = 0 Solving 8 + -1r2 = 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 + -1r2 = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1r2 = 0 + -8 -1r2 = 0 + -8 Combine like terms: 0 + -8 = -8 -1r2 = -8 Divide each side by '-1'. r2 = 8 Simplifying r2 = 8 Take the square root of each side: r = {-2.828427125, 2.828427125}Solution
r = {-2.828427125, 2.828427125, -2.828427125, 2.828427125}
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